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  • 1.
    Abdalla, H.
    et al.
    North West Univ, South Africa.
    Adam, R.
    Ecole Polytech, France.
    Aharonian, F.
    Max Planck Inst Kernphys, Germany;Dublin Inst Adv Studies, Ireland;RAU, Armenia.
    Benkhali, F. Ait
    Max Planck Inst Kernphys, Germany.
    Anguner, E. O.
    Aix Marseille Univ, France.
    Arakawa, M.
    Rikkyo Univ, Japan.
    Arcaro, C.
    North West Univ, South Africa.
    Armand, C.
    Univ Grenoble Alpes, France.
    Ashkar, H.
    Univ Paris Saclay, France.
    Backes, M.
    North West Univ, South Africa;Univ Namibia, Namibia.
    Martins, V. Barbosa
    DESY, Germany.
    Barnard, M.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Becherini, Yvonne
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Berge, D.
    DESY, Zeuthen, Germany..
    Bernloehr, K.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Bissaldi, E.
    Politecn Bari, Dipartimento Interateneo Fis, Bari, Italy.;Ist Nazl Fis Nucl, Sez Bari, Bari, Italy..
    Blackwell, R.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
    Boettcher, M.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Boisson, C.
    Univ Paris Diderot, Observ Paris, PSL Res Univ, CNRS,LUTH, Paris, France..
    Bolmont, J.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Bonnefoy, S.
    DESY, Zeuthen, Germany..
    Bregeon, J.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Breuhaus, M.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Brun, F.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Brun, P.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Bryan, M.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Amsterdam, Netherlands..
    Buechele, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Bulik, T.
    Univ Warsaw, Astron Observ, Warsaw, Poland..
    Bylund, Tomas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Capasso, M.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Caroff, S.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Carosi, A.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Casanova, S.
    Max Planck Inst Kernphys, Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Krakow, Poland..
    Cerruti, M.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France.;Univ Barcelona IEEC UB, Inst Ciencies Cosmos ICC UB, Barcelona, Spain..
    Chand, T.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Chandra, S.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Chen, A.
    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
    Colafrancesco, S.
    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa.;Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Curylo, M.
    Univ Warsaw, Astron Observ, Warsaw, Poland..
    Davids, I. D.
    Univ Namibia, Dept Phys, Windhoek, Namibia..
    Deil, C.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Devin, J.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, Gradignan, France..
    deWilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
    Dirson, L.
    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Dmytriiev, A.
    Univ Paris Diderot, Observ Paris, PSL Res Univ, CNRS,LUTH, Paris, France..
    Donath, A.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Doroshenko, V
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Dyks, J.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
    Emery, G.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Ernenwein, J-P
    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseilles, France..
    Eschbach, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Feijen, K.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
    Fegan, S.
    Ecole Polytech, Lab Leprince Ringuet, Inst Polytech Paris, UMR 7638,CNRS IN2P3, Paris, France..
    Fiasson, A.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Fontaine, G.
    Ecole Polytech, Lab Leprince Ringuet, Inst Polytech Paris, UMR 7638,CNRS IN2P3, Paris, France..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Fussling, M.
    DESY, Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Gallant, Y. A.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Gate, F.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Giavitto, G.
    DESY, Zeuthen, Germany..
    Giunti, L.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Glawion, D.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Glicenstein, J. F.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Grondin, M-H
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, Gradignan, France..
    Hahn, J.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Haupt, M.
    DESY, Zeuthen, Germany..
    Heinzelmann, G.
    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, CNRS, IPAG, Grenoble, France..
    Hermann, G.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Hinton, J. A.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Hofmann, W.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Hoischen, C.
    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
    Holch, T. L.
    Humboldt Univ, Inst Phys, Berlin, Germany..
    Holler, M.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Horns, D.
    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Huber, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Iwasaki, H.
    Rikkyo Univ, Dept Phys, Tokyo, Japan..
    Jamrozy, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
    Jankowsky, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Jankowsky, F.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Jardin-Blicq, A.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Jung-Richardt, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Kastendieck, M. A.
    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Katarzynski, K.
    Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Ctr Astron, Torun, Poland..
    Katsuragawa, M.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba, Japan..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Khangulyan, D.
    Rikkyo Univ, Dept Phys, Tokyo, Japan..
    Khelifi, B.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    King, J.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Klepser, S.
    DESY, Zeuthen, Germany..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
    Komin, Nu
    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Kostunin, D.
    DESY, Zeuthen, Germany..
    Kreter, M.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Lamanna, G.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Lemiere, A.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, Gradignan, France..
    Lenain, J-P
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Leser, E.
    DESY, Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
    Levy, C.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Lohse, T.
    Humboldt Univ, Inst Phys, Berlin, Germany..
    Lypova, I
    DESY, Zeuthen, Germany..
    Mackey, J.
    Dublin Inst Adv Studies, Dublin, Ireland..
    Majumdar, J.
    DESY, Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Marandon, V
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Marcowith, A.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Mares, A.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, Gradignan, France..
    Mariaud, C.
    Ecole Polytech, Lab Leprince Ringuet, Inst Polytech Paris, UMR 7638,CNRS IN2P3, Paris, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Maurin, G.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Meintjes, P. J.
    Univ Free State, Dept Phys, Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, Heidelberg, Germany.;Univ Zurich, Phys Inst, Zurich, Switzerland..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Moore, C.
    Univ Leicester, Dept Phys & Astron, Leicester, Leics, England..
    Moulin, E.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Muller, J.
    Ecole Polytech, Lab Leprince Ringuet, Inst Polytech Paris, UMR 7638,CNRS IN2P3, Paris, France..
    Murach, T.
    DESY, Zeuthen, Germany..
    Nakashima, S.
    RIKEN, Wako, Saitama, Japan..
    de Naurois, M.
    Ecole Polytech, Lab Leprince Ringuet, Inst Polytech Paris, UMR 7638,CNRS IN2P3, Paris, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Leicester, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Tokyo, Japan..
    Ohm, S.
    DESY, Zeuthen, Germany..
    Wilhelmi, E. de Ona
    DESY, Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
    Oya, I
    DESY, Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Petrucci, P-O
    Univ Grenoble Alpes, CNRS, IPAG, Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Piel, Q.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Pita, S.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Poireau, V
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
    Prokoph, H.
    DESY, Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Remy, Q.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Renaud, M.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Rieger, F.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Sahakian, V
    Yerevan Phys Inst, Yerevan, Armenia..
    Sailer, S.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Saito, S.
    Rikkyo Univ, Dept Phys, Tokyo, Japan..
    Sanchez, D. A.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Schulz, A.
    DESY, Zeuthen, Germany..
    Schutte, H. M.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Sol, H.
    Univ Paris Diderot, Observ Paris, PSL Res Univ, CNRS,LUTH, Paris, France..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Windhoek, Namibia..
    Stegmann, C.
    DESY, Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba, Japan..
    Tavernier, T.
    Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, APC, AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, Paris, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, Lab Leprince Ringuet, Inst Polytech Paris, UMR 7638,CNRS IN2P3, Paris, France..
    Tsirou, M.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Tokyo, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Tokyo, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Paris Cite, LPNHE, Sorbonne Univ,CNRS,IN2P3, Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Amsterdam, Netherlands..
    Voelk, H. J.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Vuillaume, T.
    Univ Grenoble Alpes, Lab Annecy Phys Particules, Univ Savoie Mt Blanc, CNRS,LAPP, Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    White, R.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Krakow, Poland.;Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Yang, R.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba, Japan..
    Zacharias, M.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, Observ Paris, PSL Res Univ, CNRS,LUTH, Paris, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Zywucka, N.
    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
    de Palma, F.
    Ist Nazl Fis Nucl, Sez Torino, Turin, Italy..
    Axelsson, M.
    Stockholm Univ, Oskar Klein Ctr, Dept Phys, Stockholm, Sweden.;KTH Royal Inst Technol, Dept Phys, Stockholm, Sweden..
    Roberts, O. J.
    Univ Space Res Assoc, USA.
    A very-high-energy component deep in the gamma-ray burst afterglow2019Inngår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 575, nr 7783, s. 464-467Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Gamma-ray bursts (GRBs) are brief flashes of gamma-rays and are considered to be the most energetic explosive phenomena in the Universe(1). The emission from GRBs comprises a short (typically tens of seconds) and bright prompt emission, followed by a much longer afterglow phase. During the afterglow phase, the shocked outflow-produced by the interaction between the ejected matter and the circumburst medium-slows down, and a gradual decrease in brightness is observed(2). GRBs typically emit most of their energy via.-rays with energies in the kiloelectronvolt-to-megaelectronvolt range, but a few photons with energies of tens of gigaelectronvolts have been detected by space-based instruments(3). However, the origins of such high-energy (above one gigaelectronvolt) photons and the presence of very-high-energy (more than 100 gigaelectronvolts) emission have remained elusive(4). Here we report observations of very-high-energy emission in the bright GRB 180720B deep in the GRB afterglow-ten hours after the end of the prompt emission phase, when the X-ray flux had already decayed by four orders of magnitude. Two possible explanations exist for the observed radiation: inverse Compton emission and synchrotron emission of ultrarelativistic electrons. Our observations show that the energy fluxes in the X-ray and gamma-ray range and their photon indices remain comparable to each other throughout the afterglow. This discovery places distinct constraints on the GRB environment for both emission mechanisms, with the inverse Compton explanation alleviating the particle energy requirements for the emission observed at late times. The late timing of this detection has consequences for the future observations of GRBs at the highest energies.

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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Aharonian, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;RAU, High Energy Astrophys Lab, 123 Hovsep Emin St, Yerevan 0051, Armenia..
    Benkhali, F. Ait
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Anguner, E. O.
    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
    Arakawa, M.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Arcaro, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Armand, C.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Ashkar, H.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Martins, V. Barbosa
    DESY, D-15738 Zeuthen, Germany..
    Barnard, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Berge, D.
    DESY, D-15738 Zeuthen, Germany..
    Bernloehr, K.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Blackwell, R.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Bottcher, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
    Bonnefoy, S.
    DESY, D-15738 Zeuthen, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Breuhaus, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Brun, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
    Bylund, Tomas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
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    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Casanova, S.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France.;Univ Barcelona, IEEC UB, Inst Ciencies Cosmos ICC UB, Marti Franques 1, E-08028 Barcelona, Spain..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Chen, A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Colafrancesco, S.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Curylo, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Davids, I. D.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Deil, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Devin, J.
    Univ Bordeaux, CNRS, Ctr Etud Nucleaires Bordeaux Gradignan, IN2P3, F-33175 Gradignan, France..
    deWilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Dirson, L.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Dmytriiev, A.
    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Donath, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Doroshenko, V
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Drury, L. O ' C
    Dyks, J.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Emery, G.
    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
    Ernenwein, J-P
    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Fegan, S.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Fiasson, A.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Fontaine, G.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fuessling, M.
    DESY, D-15738 Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Gallant, Y. A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Gate, F.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Giavitto, G.
    DESY, D-15738 Zeuthen, Germany..
    Glawion, D.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Glicenstein, J. F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Grondin, M-H
    Univ Bordeaux, CNRS, Ctr Etud Nucleaires Bordeaux Gradignan, IN2P3, F-33175 Gradignan, France..
    Hahn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Haupt, M.
    DESY, D-15738 Zeuthen, Germany..
    Heinzelmann, G.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
    Hermann, G.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hinton, J. A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hofmann, W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hoischen, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Holch, T. L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Holler, M.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Horns, D.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Huber, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Jardin-Blicq, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Jung-Richardt, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Nicolaus Copernicus Univ, Ctr Astron, Fac Phys Astron & Informat, Grudziadzka 5, PL-87100 Torun, Poland..
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    Univ Tokyo, Inst Adv Study UTIAS, Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    King, J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Klepser, S.
    DESY, D-15738 Zeuthen, Germany..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Komin, Nu
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Kostunin, D.
    DESY, D-15738 Zeuthen, Germany..
    Kraus, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Lamanna, G.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, CNRS, Ctr Etud Nucleaires Bordeaux Gradignan, IN2P3, F-33175 Gradignan, France..
    Lenain, J-P
    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
    Leser, E.
    DESY, D-15738 Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Levy, C.
    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Marandon, V
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Bordeaux, CNRS, Ctr Etud Nucleaires Bordeaux Gradignan, IN2P3, F-33175 Gradignan, France..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Maurin, G.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Meintjes, P. J.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Muller, J.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Moore, C.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Murach, T.
    DESY, D-15738 Zeuthen, Germany..
    Nakashima, S.
    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    de Naurois, M.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Wilhelmi, E. de Ona
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I
    DESY, D-15738 Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
    Petrucci, P-O
    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Remy, Q.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V
    Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Schuessler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schutte, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Stegmann, C.
    DESY, D-15738 Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, Inst Adv Study UTIAS, Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, AstroParticule & Cosmol, CNRS IN2P3, CEA Irfu,Observ Paris,Sorbonne Paris Cite,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Sorbonne Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS IN2P3,LPNHE, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 Amsterdam, Netherlands..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Grenoble Alpes, Univ Savoie Mt Blanc, LAPP, CNRS, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.;Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, Inst Adv Study UTIAS, Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N. N.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Smith, P. S.
    Univ Arizona, Steward Observ, Tucson, AZ 85721 USA..
    HESS detection of very high-energy gamma-ray emission from the quasar PKS 0736+0172020Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 633, s. 1-11, artikkel-id A162Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context. Flat-spectrum radio-quasars (FSRQs) are rarely detected at very high energies (E& x2004;>=& x2004;100 GeV) due to their low-frequency-peaked spectral energy distributions. At present, only six FSRQs are known to emit very high-energy (VHE) photons, representing only 7% of the VHE extragalactic catalog, which is largely dominated by high-frequency-peaked BL Lacertae objects. Aims. Following the detection of MeV-GeV gamma-ray flaring activity from the FSRQ PKS 0736+017 (z& x2004;=& x2004;0.189) with Fermi-LAT, the H.E.S.S. array of Cherenkov telescopes triggered target-of-opportunity (ToO) observations on February 18, 2015, with the goal of studying the gamma-ray emission in the VHE band. Methods. H.E.S.S. ToO observations were carried out during the nights of February 18, 19, 21, and 24, 2015. Together with Fermi-LAT, the multi-wavelength coverage of the flare includes Swift observations in soft X-ray and optical-UV bands, and optical monitoring (photometry and spectro-polarimetry) by the Steward Observatory, and the ATOM, the KAIT, and the ASAS-SN telescopes. Results. VHE emission from PKS 0736+017 was detected with H.E.S.S. only during the night of February 19, 2015. Fermi-LAT data indicate the presence of a gamma-ray flare, peaking at the time of the H.E.S.S. detection, with a flux doubling timescale of around six hours. The gamma-ray flare was accompanied by at least a 1 mag brightening of the non-thermal optical continuum. No simultaneous observations at longer wavelengths are available for the night of the H.E.S.S. detection. The gamma-ray observations with H.E.S.S. and Fermi-LAT are used to put constraints on the location of the gamma-ray emitting region during the flare: it is constrained to be just outside the radius of the broad-line region r(BLR) with a bulk Lorentz factor Gamma& x2004;similar or equal to& x2004;20, or at the level of the radius of the dusty torus r(torus) with Gamma& x2004;similar or equal to& x2004;60. Conclusions. PKS 0736+017 is the seventh FSRQ known to emit VHE photons, and at z& x2004;=& x2004;0.189 is the nearest so far. The location of the gamma-ray emitting region during the flare can be tightly constrained thanks to opacity, variability, and collimation arguments.

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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;RAU, High Energy Astrophys Lab, 123 Hovsep Emin St, Yerevan 0051, Armenia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
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    DESY, D-15738 Zeuthen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, GRAPPA, Anton Pannekoek Inst Astron, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, Sorbonne Paris Cite,CNRS,IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej Pan, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, Sorbonne Paris Cite,CNRS,IN2P3, 4 Pl Jussieu, F-75252 Paris, France.;Univ Barcelona IEEC UB, Inst Ciencies Cosmos ICC UB, Marti Franques 1, Barcelona 08028, Spain..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, Observ Paris, Sorbonne Paris Cite,CNRS,IN2P3,CEA,Irfu,APC, 10,Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, Sorbonne Paris Cite,CNRS,IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Ecole Polytech, Lab Leprince Ringuet, UMR 7638, CNRS,IN2P3 Inst Polytech Paris, F-91128 Palaiseau, France..
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    Ecole Polytech, Lab Leprince Ringuet, UMR 7638, CNRS,IN2P3 Inst Polytech Paris, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, Observ Paris, Sorbonne Paris Cite,CNRS,IN2P3,CEA,Irfu,APC, 10,Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Ecole Polytech, Lab Leprince Ringuet, UMR 7638, CNRS,IN2P3 Inst Polytech Paris, F-91128 Palaiseau, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej Pan, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, 7-3-1 Hongo, Tokyo 1130033, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Wilhelmi, E. de Ona
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I
    DESY, D-15738 Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Univ, LPNHE, Sorbonne Paris Cite,CNRS,IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P-O
    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, AstroParticule & Cosmol, Observ Paris, Sorbonne Paris Cite,CNRS,IN2P3,CEA,Irfu,APC, 10,Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Remy, Q.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V
    Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schutte, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Simoni, R.
    Univ Amsterdam, GRAPPA, Anton Pannekoek Inst Astron, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, AstroParticule & Cosmol, Observ Paris, Sorbonne Paris Cite,CNRS,IN2P3,CEA,Irfu,APC, 10,Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, Observ Paris, Sorbonne Paris Cite,CNRS,IN2P3,CEA,Irfu,APC, 10,Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, AstroParticule & Cosmol, Observ Paris, Sorbonne Paris Cite,CNRS,IN2P3,CEA,Irfu,APC, 10,Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, Lab Leprince Ringuet, UMR 7638, CNRS,IN2P3 Inst Polytech Paris, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van Der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, LPNHE, Sorbonne Paris Cite,CNRS,IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, GRAPPA, Anton Pannekoek Inst Astron, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej Pan, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.;Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Meyer, M.
    Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.;Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA..
    Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE gamma-ray observations with HESS2019Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 627, s. 1-19, artikkel-id A159Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (100MeV < E < 100 GeV) gamma-ray band, which is continuously monitored with Fermi-LAT. During two periods of high activity in April 2014 and June 2015 target-of-opportunity observations were undertaken with the High Energy Stereoscopic System (H.E.S.S.) in the very-high-energy (VHE, E > 100 GeV) gamma-ray domain. While the observation in 2014 provides an upper limit, the observation in 2015 results in a signal with 8 : 7 sigma significance above an energy threshold of 66 GeV. No VHE variability was detected during the 2015 observations. The VHE photon spectrum is soft and described by a power-law index of 4.2 +/- 0.3. The H.E.S.S. data along with a detailed and contemporaneous multiwavelength data set provide constraints on the physical parameters of the emission region. The minimum distance of the emission region from the central black hole was estimated using two plausible geometries of the broad-line region and three potential intrinsic spectra. The emission region is confidently placed at r greater than or similar to 1 : 7 X 1017 cm from the black hole, that is beyond the assumed distance of the broad-line region. Time-dependent leptonic and lepto-hadronic one-zone models were used to describe the evolution of the 2015 flare. Neither model can fully reproduce the observations, despite testing various parameter sets. Furthermore, the H.E.S.S. data were used to derive constraints on Lorentz invariance violation given the large redshift of 3C 279.

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    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;RAU, High Energy Astrophys Lab, 123 Hovsep Emin St, Yerevan 0051, Armenia..
    Benkhali, F. Ait
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    DESY, D-15738 Zeuthen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fiz Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France.;Univ Barcelona, IEEC, ICC, Marti Franques 1, E-08028 Barcelona, Spain..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland.;Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    DESY, D-15738 Zeuthen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany.;Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    DESY, D-15738 Zeuthen, Germany..
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    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
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    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Inst Fiz Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I.
    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P-O
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Remy, Q.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEAIrfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Inst Fiz Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.;Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Bordas, P.
    Univ Barcelona, IEEC, ICC, Marti Franques 1, E-08028 Barcelona, Spain..
    HESS and Fermi-LAT observations of PSR B1259-63/LS 2883 during its 2014 and 2017 periastron passages2020Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 633, s. 1-14, artikkel-id A102Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context. PSR B1259-63/LS 2883 is a gamma-ray binary system consisting of a pulsar in an eccentric orbit around a bright Oe stellar-type companion star that features a dense circumstellar disc. The bright broad-band emission observed at phases close to periastron offers a unique opportunity to study particle acceleration and radiation processes in binary systems. Observations at gamma-ray energies constrain these processes through variability and spectral characterisation studies. Aims. The high- and very-high-energy (HE, VHE) gamma-ray emission from PSR B1259-63/LS 2883 around the times of its periastron passage are characterised, in particular, at the time of the HE gamma-ray flares reported to have occurred in 2011, 2014, and 2017. Short-term and average emission characteristics of PSR B1259-63/LS 2883 are determined. Super-orbital variability is searched for in order to investigate possible cycle-to-cycle VHE flux changes due to different properties of the companion star's circumstellar disc and/or the conditions under which the HE gamma-ray flares develop. Methods. Spectra and light curves were derived from observations conducted with the H.E.S.S-II array in 2014 and 2017. Phase-folded light curves are compared with the results obtained in 2004, 2007, and 2011. Fermi-LAT observations from 2010/11, 2014, and 2017 are analysed. Results. A local double-peak profile with asymmetric peaks in the VHE light curve is measured, with a flux minimum at the time of periastron t(p) and two peaks coinciding with the times at which the neutron star crosses the companion's circumstellar disc (similar to t(p) 16 d). A high VHE gamma-ray flux is also observed at the times of the HE gamma-ray flares (similar to t(p) + 30 d) and at phases before the first disc crossing (similar to t(p) - 35 d). The spectral energy range now extends to below 200 GeV and up to similar to 45 TeV. Conclusions. PSR B1259-63/LS 2883 displays periodic flux variability at VHE gamma-rays without clear signatures of super-orbital modulation in the time span covered by the monitoring of the source with the H.E.S.S. telescopes. This flux variability is most probably caused by the changing environmental conditions, particularly at times close to periastron passage at which the neutron star is thought to cross the circumstellar disc of the companion star twice. In contrast, the photon index remains unchanged within uncertainties for about 200 d around periastron. At HE gamma-rays, PSR B1259-63/LS 2883 has now been detected also before and after periastron, close to the disc crossing times. Repetitive flares with distinct variability patterns are detected in this energy range. Such outbursts are not observed at VHEs, although a relatively high emission level is measured. The spectra obtained in both energy regimes displays a similar slope, although a common physical origin either in terms of a related particle population, emission mechanism, or emitter location is ruled out.

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    Max Planck Inst Kernphys, Heidelberg, Germany.;Dublin Inst Adv Studies, Dublin, Ireland.;Natl Acad Sci Republ Armenia, Yerevan, Armenia..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo, Japan..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Windhoek, Namibia..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl 4 Weltraum & Astrophys, Bochum, Germany..
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    DESY, Zeuthen, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, Paris, France..
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    DESY, Zeuthen, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    Max Planck Inst Kernphys, Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, Paris, France.;Univ Barcelona IEEC UB, Inst Ciencies Cosmos ICC UB, Barcelona, Spain..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
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    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
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    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, Gradignan, France..
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    Univ Namibia, Dept Phys, Windhoek, Namibia..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
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    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, Meudon, France..
    Donath, A.
    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Drury, L. O ' C
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
    Fontaine, G.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Fuessling, M.
    DESY, Zeuthen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    DESY, Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Grondin, M. -H
    Hahn, J.
    Max Planck Inst Kernphys, Heidelberg, Germany..
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    DESY, Zeuthen, Germany..
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    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
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    Univ Grenoble Alpes, CNRS, IPAG, Grenoble, France..
    Hermann, G.
    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Berlin, Germany..
    Holler, M.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Horns, D.
    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
    Huber, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Iwasaki, H.
    Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo, Japan..
    Jacholkowska, A.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, Paris, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Jankowsky, F.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
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    Nicolaus Copernicus Univ, Ctr Astron, Fac Phys Astron & Informat, Torun, Poland..
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    Univ Tokyo, Inst Adv Study UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, Kashiwa, Chiba, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Khangulyan, D.
    Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo, Japan..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
    King, J.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
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    DESY, Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
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    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, Meudon, France..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, Gradignan, France..
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    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
    Lohse, T.
    Humboldt Univ, Inst Phys, Berlin, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    DESY, Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
    Marandon, V.
    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
    Mariaud, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    Univ Free State, Dept Phys, Bloemfontein, South Africa..
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    Max Planck Inst Kernphys, Heidelberg, Germany.;Univ Zurich, Phys Inst, Zurich, Switzerland..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
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    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Leicester, Dept Phys & Astron, Leicester, Leics, England..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
    Murach, T.
    DESY, Zeuthen, Germany..
    Nakashima, S.
    RIKEN, Wako, Saitama, Japan..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Leicester, Leics, England..
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    Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo, Japan..
    Ohm, S.
    DESY, Zeuthen, Germany..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
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    DESY, Zeuthen, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, Paris, France..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
    Pita, S.
    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
    Prokoph, H.
    DESY, Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
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    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, Innsbruck, Austria..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Natl Acad Sci Republ Armenia, Yerevan, Armenia.;Yerevan Phys Inst, Yerevan, Armenia..
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    Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo, Japan..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl 4 Weltraum & Astrophys, Bochum, Germany..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    DESY, Zeuthen, Germany..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    Univ Witwatersrand, Sch Phys, Johannesburg, South Africa..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Namibia, Dept Phys, Windhoek, Namibia..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Amsterdam, Netherlands..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, Meudon, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
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    Univ Namibia, Dept Phys, Windhoek, Namibia..
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    DESY, Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
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    Univ Potsdam, Inst Phys & Astron, Potsdam, Germany..
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    Univ Tokyo, Inst Adv Study UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, Kashiwa, Chiba, Japan..
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    Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France..
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    DESY, Zeuthen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, Observ Paris, APC,CNRS,IN2P3,CEA,Irfu, Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Hamburg, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo, Japan..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo, Japan..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Univ Free State, Dept Phys, Bloemfontein, South Africa..
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    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72, Montpellier, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, Paris, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Amsterdam, Netherlands..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA, Australia..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, Annecy, France..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
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    Stockholm Univ, Dept Phys, Oskar Klein Ctr, Albanova Univ Ctr, Stockholm, Sweden..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Inst Fizyki Jadrowej PAN, Krakow, Poland..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Univ Tokyo, Inst Adv Study UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, Kashiwa, Chiba, Japan..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, Palaiseau, France..
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    North West Univ, Ctr Space Res, Potchefstroom, South Africa..
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    Max Planck Inst Kernphys, Heidelberg, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, LUTH,CNRS, Meudon, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Krakow, Poland..
    Resolving the Crab pulsar wind nebula at teraelectronvolt energies2020Inngår i: Nature Astronomy, E-ISSN 2397-3366, Vol. 4, nr 2, s. 167-173Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An angular extension at gamma-ray energies of 52 arcseconds is detected for the Crab nebula, revealing the emission region of the highest-energy gamma rays; simulations of the electromagnetic emission provide a non-trivial test of our understanding of particle acceleration in the Crab nebula. The Crab nebula is one of the most-studied cosmic particle accelerators, shining brightly across the entire electromagnetic spectrum up to very-high-energy gamma rays(1,2). It is known from observations in the radio to gamma-ray part of the spectrum that the nebula is powered by a pulsar, which converts most of its rotational energy losses into a highly relativistic outflow. This outflow powers a pulsar wind nebula, a region of up to ten light-years across, filled with relativistic electrons and positrons. These particles emit synchrotron photons in the ambient magnetic field and produce very-high-energy gamma rays by Compton up-scattering of ambient low-energy photons. Although the synchrotron morphology of the nebula is well established, it has not been known from which region the very-high-energy gamma rays are emitted(3-8). Here we report that the Crab nebula has an angular extension at gamma-ray energies of 52 arcseconds (assuming a Gaussian source width), much larger than at X-ray energies. This result closes a gap in the multi-wavelength coverage of the nebula, revealing the emission region of the highest-energy gamma rays. These gamma rays enable us to probe a previously inaccessible electron and positron energy range. We find that simulations of the electromagnetic emission reproduce our measurement, providing a non-trivial test of our understanding of particle acceleration in the Crab nebula.

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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;RAU, High Energy Astrophys Lab, 123 Hovsep Emin St, Yerevan 0051, Armenia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
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    DESY, D-15738 Zeuthen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France.;Univ Barcelona, Inst Ciencies Cosmos, IEEC UB, E-08028 Barcelona, Spain..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Devin, J.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    de Wilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Dirson, L.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Dmytriiev, A.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Donath, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Doroshenko, V
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Drury, L. O ' C
    Dyks, J.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Emery, G.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Ernenwein, J-p
    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
    Eschbach, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Feijen, K.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Fegan, S.
    Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Fiasson, A.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Fontaine, G.
    Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fuessling, M.
    DESY, D-15738 Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Gallant, Y. A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Gate, F.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Giavitto, G.
    DESY, D-15738 Zeuthen, Germany..
    Glawion, D.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Glicenstein, J. F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Grondin, M-H
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Hahn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Haupt, M.
    DESY, D-15738 Zeuthen, Germany..
    Heinzelmann, G.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
    Hermann, G.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hinton, J. A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hofmann, W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hoischen, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Holch, T. L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Holler, M.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Horns, D.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Huber, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Iwasaki, H.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Jamrozy, M.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Jankowsky, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Jankowsky, F.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Jung-Richardt, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kastendieck, M. A.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Katarzynski, K.
    Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Ctr Astron, Grudziadzka 5, PL-87100 Torun, Poland..
    Katsuragawa, M.
    Univ Tokyo, Kavli Inst Phys & Math Universe WPI, UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Khangulyan, D.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Khelifi, B.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    King, J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Klepser, S.
    DESY, D-15738 Zeuthen, Germany..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Komin, Nu
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Kostunin, D.
    DESY, D-15738 Zeuthen, Germany..
    Kraus, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Lamanna, G.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Lau, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Lemiere, A.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Lenain, J-P
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Leser, E.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Levy, C.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Lohse, T.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Lopez-Coto, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Lypova, I
    DESY, D-15738 Zeuthen, Germany..
    Mackey, J.
    Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland..
    Majumdar, J.
    DESY, D-15738 Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Marandon, V
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Marcowith, A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Mares, A.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Mariaud, C.
    Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Maurin, G.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Meintjes, P. J.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Muller, J.
    Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Moore, C.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Murach, T.
    DESY, D-15738 Zeuthen, Germany..
    Nakashima, S.
    Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland..
    de Naurois, M.
    Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan. RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Wilhelmi, E. de Ona
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I
    DESY, D-15738 Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P-O
    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Remy, Q.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V
    Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schutte, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, Kavli Inst Phys & Math Universe WPI, UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CNRS,IN2P3,CEA,Irfu,APC, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3,CC 72, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Grenoble Alpes, Univ Savoie Mt Blanc, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.;Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, Kavli Inst Phys & Math Universe WPI, UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Maxted, N. , I
    Upper limits on very-high-energy gamma-ray emission from core-collapse supernovae observed with HESS2019Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 626, s. 1-11, artikkel-id A57Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Young core-collapse supernovae with dense-wind progenitors may be able to accelerate cosmic-ray hadrons beyond the knee of the cosmic-ray spectrum, and this may result in measurable gamma-ray emission. We searched for gamma-ray emission from ten super- novae observed with the High Energy Stereoscopic System (H.E.S.S.) within a year of the supernova event. Nine supernovae were observed serendipitously in the H.E.S.S. data collected between December 2003 and December 2014, with exposure times ranging from 1.4 to 53 h. In addition we observed SN 2016adj as a target of opportunity in February 2016 for 13 h. No significant gamma-ray emission has been detected for any of the objects, and upper limits on the >1 TeV gamma-ray flux of the order of similar to 10(-13) cm(-)(2)s(-1) are established, corresponding to upper limits on the luminosities in the range similar to 2 x 10(39) to similar to 1 x 10(42) erg s(-1). These values are used to place model-dependent constraints on the mass-loss rates of the progenitor stars, implying upper limits between similar to 2 x 10(-5) and similar to 2 x 10(-3) M-circle dot yr(-1) under reasonable assumptions on the particle acceleration parameters.

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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,AstroParticule & Cosmol,CNRS IN2P3, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,AstroParticule & Cosmol,CNRS IN2P3, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Japan Aerosp Explorat Agcy JAXA, ISAS, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Univ Potsdam, Inst Phys Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Japan Aerosp Explorat Agcy JAXA, ISAS, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
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    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Japan Aerosp Explorat Agcy JAXA, ISAS, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
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    DESY, D-15738 Zeuthen, Germany..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
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    Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;ITA Univ Heidelberg, Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,AstroParticule & Cosmol,CNRS IN2P3, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,AstroParticule & Cosmol,CNRS IN2P3, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
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    Univ Potsdam, Inst Phys Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Sushch, I
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Takahashi, T.
    Japan Aerosp Explorat Agcy JAXA, ISAS, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
    Tavernet, J-P
    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,AstroParticule & Cosmol,CNRS IN2P3, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univ & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Viana, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Sao Paulo, Inst Fis Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS IN2P3, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, P.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Wagner, R. M.
    Stockholm Univ, Albanova Univ Ctr, Oskar Klein Ctr, Dept Phys, S-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Woernlein, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zaborov, D.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Zefi, F.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    The starburst galaxy NGC 253 revisited by HESS and Fermi-LAT2018Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 617, artikkel-id A73Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context. NGC 253 is one of only two starburst galaxies found to emit gamma-rays from hundreds of MeV to multi-TeV energies. Accurate measurements of the very-high-energy (VHE; E> 100 GeV) and high-energy (HE; E > 60 MeV) spectra are crucial to study the underlying particle accelerators, probe the dominant emission mechanism(s) and to study cosmic-ray interaction and transport. Aims. The measurement of the VHE gamma-ray emission of NGC 253 published in 2012 by H.E.S.S. was limited by large systematic uncertainties. Here, the most up to date measurement of the gamma-ray spectrum of NGC 253 is investigated in both HE and VHE gamma-rays. Assuming a hadronic origin of the gamma-ray emission, the measurement uncertainties are propagated into the interpretation of the accelerated particle population. Methods. The data of H.E.S.S. observations are reanalysed using an updated calibration and analysis chain. The improved Fermi-LAT analysis employs more than 8 yr of data processed using pass 8. The cosmic-ray particle population is evaluated from the combined HE-VHE gamma-ray spectrum using NAIMA in the optically thin case. Results. The VHE gamma-ray energy spectrum is best fit by a power-law distribution with a flux normalisation of (1.34 +/- 0.14(stat) +/- 0.27(sys)) x 10(-13) cm(-2) s(-1) TeV-1 at 1 TeV - about 40% above, but compatible with the value obtained in Abramowski et al. (2012). The spectral index Gamma = 2.39 +/- 0.14(stat) +/- 0.25(sys) is slightly softer than but consistent with the previous measurement within systematic errors. In the Fermi energy range an integral flux of F(E > 60 MeV) = (1.56 +/- 0.28(stat) +/- 0.15(sys)) x 10(-8) cm(-2) s(-1) is obtained. At energies above similar to 3 GeV the HE spectrum is consistent with a power-law ranging into the VHE part of the spectrum measured by H.E.S.S. with an overall spectral index Gamma = 2.22 +/- 0.06(stat). Conclusions. Two scenarios for the starburst nucleus are tested, in which the gas in the starburst nucleus acts as either a thin or a thick target for hadronic cosmic rays accelerated by the individual sources in the nucleus. In these two models, the level to which NGC 253 acts as a calorimeter is estimated to a range of f(cal) = 0.1 to 1 while accounting for the measurement uncertainties. The presented spectrum is likely to remain the most accurate measurements until the Cherenkov Telescope Array (CTA) has collected a substantial set of data towards NGC 253.

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    Univ Savoie Mt Blanc, France.
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    Univ Paris Diderot, France.
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    North West Univ, South Africa;Univ Namibia, Namibia.
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, LUTH, Observ Paris, PSL Res Univ,CNRS, 5 Pl Jules Janssen, E-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, GRAPPA, Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, LUTH, Observ Paris, PSL Res Univ,CNRS, 5 Pl Jules Janssen, E-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Golm, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Golm, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Uniwersytet Jagiellonski, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Nicolaus Copernicus Univ, Ctr Astron, Fac Phys Astron & Informat, Grudziadzka 5, PL-87100 Torun, Poland..
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    Japan Aerosp Explorat Agcy JAXA, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Japan Aerosp Explorat Agcy JAXA, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
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    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Uniwersytet Jagiellonski, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland..
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    DESY, D-15738 Zeuthen, Germany..
    Padovani, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P. -O
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Thilchenphys, A-6020 Innsbruck, Austria..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;ITA Univ Heidelberg, D-69117 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V.
    Natl Acad Sci Republ Armenia, Marshall Baglzramian Ave, Yerevan 240019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, GRAPPA, Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, LUTH, Observ Paris, PSL Res Univ,CNRS, 5 Pl Jules Janssen, E-92190 Meudon, France..
    Spanier, F.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    DESY, D-15738 Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Golm, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Golm, Germany..
    Sushch, I.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Takahashi, T.
    Japan Aerosp Explorat Agcy JAXA, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2298510, Japan..
    Tavernet, J. -P
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, AstroParticule & Cosmol, Sorbonne Paris Cite, Observ Paris,APC,CNRS,IN2P3,CEA Irfu, 10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Aix Marseille Univ, CNRS, IN2P3, CPPM, F-13288 Marseille 09, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9100 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Viana, A.
    Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil.;Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,Lab Phys Theor & Hautes Energies, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, GRAPPA, Astron Inst Anton Pannekoek, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS, F-74000 Annecy, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, P.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Wagner, R. M.
    Stockholm Univ, Oskar Klein Ctr, Albanova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Woernlein, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zaborov, D.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, LUTH, Observ Paris, PSL Res Univ,CNRS, 5 Pl Jules Janssen, E-92190 Meudon, France..
    Zefi, F.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    VHE gamma-ray discovery and multiwavelength study of the blazar 1ES 2322-4092019Inngår i: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 482, nr 3, s. 3011-3022Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A hotspot at a position compatible with the BL. Lac object 1ES 2322-409 was serendipitously detected with H.E.S.S. during observations performed in 2004 and 2006 on the blazar PKS 2316-423. Additional data on 1ES 2322-409 were taken in 2011 and 2012, leading to a total live-time of 22.3 h. Point-like very-high-energy (VHE; E > 100 GeV) gamma-ray emission is detected from a source centred on the IFS 2322-409 position, with an excess of 116.7 events at a significance of 6.0 sigma. The average VHE gamma-ray spectrum is well described with a power law with a photon index Gamma = 3.40 +/- 0.66(stat) +/- 0.20(sys) and an integral flux Phi(E > 200 GeV) = (3.11 +/- 0.71(stat) 0.62(sys)) x 10(-2)cm(-2)s(-1), which corresponds to 1.1 per cent of the Crab nebula flux above 200 GeV. Multiwavelength data obtained with Fermi LAT, Swift XRT and UVOT, RXTE PCA, ATOM, and additional data from WISE, GROND, and Catalina are also used to characterize the broad-band non-thermal emission of lES 2322-409. The multiwavelength behaviour indicates day-scale variability. Swift UVOT and XRT data show strong variability at longer scales. A spectral energy distribution (SED) is built from contemporaneous observations obtained around a high state identified in Swift data. A modelling of the SED is performed with a stationary homogeneous one-zone synchrotronself-Compton leptonic model. The redshift of the source being unknown, two plausible values were tested for the modelling. A systematic scan of the model parameters space is performed, resulting in a well-constrained combination of values providing a good description of the broad-band behaviour of 1ES 2322-409.

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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan, Armenia..
    Benkhali, F. Ait
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
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    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl IV Weltraum & Astrophys, D-44780 Bochum, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
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    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Jankowsky, F.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Jouvin, L.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Jung-Richardt, I.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Kastendieck, M. A.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Katarzynski, K.
    Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Ctr Astron, Grudziadzka 5, PL-87100 Torun, Poland..
    Katsuragawa, M.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Univ Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Kerszberg, D.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Khangulyan, D.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Khelifi, B.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    King, J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Klepser, S.
    DESY, D-15738 Zeuthen, Germany..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Komin, Nu.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Krakau, S.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl IV Weltraum & Astrophys, D-44780 Bochum, Germany..
    Kraus, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Kruger, P. P.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Lamanna, G.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
    Lau, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Lefaucheur, J.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Lemiere, A.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Lenain, J. -P
    Leser, E.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Lohse, T.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Lorentz, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Lopez-Coto, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Lypova, I.
    DESY, D-15738 Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Marandon, V.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Marcowith, A.
    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
    Mariaud, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Maurin, G.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
    Meintjes, P. J.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Murach, T.
    DESY, D-15738 Zeuthen, Germany..
    Nakashima, S.
    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    de Naurois, M.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I.
    DESY, D-15738 Zeuthen, Germany..
    Padovani, M.
    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P. -O
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro Teilchenphys, A-6020 Innsbruck, Austria..
    Renaud, M.
    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V.
    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl IV Weltraum & Astrophys, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Spanier, F.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Univ Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernet, J. -P
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, Sorbonne Paris Cite, APC AstroParticule & Cosmol, CNRS,IN2P3,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Universe & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Viana, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Sao Paulo, Inst Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, R. M.
    Stockholm Univ, Albanova Univ Ctr, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zaborov, D.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, CNRS, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Zefi, F.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-14476 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Cirelli, M.
    CNRS, LPTHE, 4 Pl Jussieu, F-75252 Paris, France.;Sorbonne Univ, LPTHE, 4 Pl Jussieu, F-75252 Paris, France..
    Panci, P.
    CERN, Theoret Phys Dept, Geneva, Switzerland..
    Sala, F.
    CNRS, LPTHE, 4 Pl Jussieu, F-75252 Paris, France.;Sorbonne Univ, LPTHE, 4 Pl Jussieu, F-75252 Paris, France.;DESY, Notkestr 85, D-22607 Hamburg, Germany..
    Silk, J.
    CNRS, IAP, UMR 7095, 98 Bis Blvd Arago, F-75014 Paris, France.;Sorbonne Univ, 98 Bis Blvd Arago, F-75014 Paris, France.;Univ Oxford, Dept Phys, BIPAC, Denys Wilkinson Bldg,1 Keble Rd, Oxford OX1 3RH, England.;JHU, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA..
    Taoso, M.
    UAM, IFT, CSIC, Calle Nicolas Cabrera 13-15, Madrid 28049, Spain.;INFN, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy..
    Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with HESS2018Inngår i: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, nr 11, artikkel-id 037Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about <sigma upsilon > less than or similar to 3 x 10(-25) cm(3) s(-1) are obtained in the mass range of 400 GeV to 1TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.

  • 10.
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    Max Planck Inst Kernphys, Germany;Dublin Inst Adv Studies, Ireland;Natl Acad Sci Republ Armenia, Armenia.
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    Max Planck Inst Kernphys, Germany.
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    Aix Marseille Univ, France.
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    Rikkyo Univ, Japan.
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    North West Univ, South Africa.
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    Univ Savoie Mont Blanc, France.
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    PSL Res Univ, France.
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    North West Univ, South Africa;Univ Namibia, Namibia.
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    North West Univ, South Africa.
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Ruhr Univ Bochum, Inst Theoret Phys Lehrstuhl Weltraum & Astrophys, D-44780 Bochum, Germany..
    Berge, D.
    DESY, D-15738 Zeuthen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Bernloehr, K.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Blackwell, R.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    PSL Res Univ, CNRS, Univ Paris Diderot, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Bonnefoy, S.
    DESY, D-15738 Zeuthen, Germany..
    Bordas, P.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Bregeon, J.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Bryan, M.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
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    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
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    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Chandra, S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Chaves, R. C. G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Chen, A.
    Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa..
    Colafrancesco, S.
    Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa..
    Condon, B.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Davids, I. D.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Deil, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Devin, J.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    deWilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Dirson, L.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Dmytriiev, A.
    PSL Res Univ, CNRS, Univ Paris Diderot, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Donath, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Doroshenko, V
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Drury, L. O ' C
    Dyks, J.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Emery, G.
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Ernenwein, J-P
    Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France..
    Eschbach, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fegan, S.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Fiasson, A.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Fontaine, G.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fuessling, M.
    DESY, D-15738 Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Gallant, Y. A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Gate, F.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Giavitto, G.
    DESY, D-15738 Zeuthen, Germany..
    Glawion, D.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Glicenstein, J. F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Grondin, M-H
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Hahn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Haupt, M.
    DESY, D-15738 Zeuthen, Germany..
    Heinzelmann, G.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
    Hermann, G.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hinton, J. A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hofmann, W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hoischen, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Holch, T. L.
    Humboldt Univ, Inst Phys, D-12489 Berlin, Germany..
    Holler, M.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Horns, D.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Huber, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Iwasaki, H.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Jacholkowska, A.
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Jamrozy, M.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Jankowsky, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Jankowsky, F.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Jouvin, L.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Jung-Richardt, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kastendieck, M. A.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Katarzynski, K.
    Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Ctr Astron, Grudziadzka 5, PL-87100 Torun, Poland..
    Katsuragawa, M.
    Univ Tokyo, Kavli IPMU, UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kerszberg, D.
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Khangulyan, D.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Khelifi, B.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    King, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Klepser, S.
    DESY, D-15738 Zeuthen, Germany..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Komin, Nu
    Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Krakau, S.
    Ruhr Univ Bochum, Inst Theoret Phys Lehrstuhl Weltraum & Astrophys, D-44780 Bochum, Germany..
    Kraus, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kruger, P. P.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Lamanna, G.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Lau, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Lefaucheur, J.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Lemiere, A.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Lenain, J-P
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Leser, E.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Lohse, T.
    Humboldt Univ, Inst Phys, D-12489 Berlin, Germany..
    Lorentz, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Lopez-Coto, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Lypova, I
    DESY, D-15738 Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Marandon, V
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Marcowith, A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Mariaud, C.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Maurin, G.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Meintjes, P. J.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Murach, T.
    DESY, D-15738 Zeuthen, Germany..
    Nakashima, S.
    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    de Naurois, M.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I
    DESY, D-15738 Zeuthen, Germany..
    Padovani, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Petrucci, P-O
    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Pita, S.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Poireau, V
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D.
    Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;ITA Univ Heidelberg, Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V
    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia.;Yerevan Phys Inst, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Inst Theoret Phys Lehrstuhl Weltraum & Astrophys, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schwanke, U.
    Humboldt Univ, Inst Phys, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa..
    Shilon, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Sol, H.
    PSL Res Univ, CNRS, Univ Paris Diderot, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Spanier, F.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    DESY, D-15738 Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, Kavli IPMU, UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernet, J-P
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, Observ Paris, IN2P3, CNRS,APC,CEA Irfu,AstroParticule & Cosmol,Sorbonn, 10 Rue Alice Domon & Leonie, F-75205 Paris 13, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Vincent, P.
    UPMC Univ Paris 06, Univ Paris Diderot, LPNHE, Sorbonne Univ,CNRS,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris 5, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Savoie Mont Blanc, Lab Annecy le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, R. M.
    Stockholm Univ, Albanova Univ Ctr, Oskar Klein Ctr, Dept Phys, SE-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zaborov, D.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    PSL Res Univ, CNRS, Univ Paris Diderot, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Zefi, F.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Ul Orla 171, PL-30244 Krakow, Poland..
    The 2014TeV gamma-Ray Flare of Mrk 501 Seen with HESS: Temporal and Spectral Constraints on Lorentz Invariance Violation2019Inngår i: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 870, nr 2, artikkel-id 93Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The blazar Mrk 501 (z = 0.034) was observed at very-high-energy (VHE, E greater than or similar to 100 GeV) gamma-ray wavelengths during a bright flare on the night of 2014 June 23-24 (MJD 56832) with the H.E.S.S. phase-II array of Cherenkov telescopes. Data taken that night by H.E.S.S. at large zenith angle reveal an exceptional number of gamma-ray photons at multi-TeV energies, with rapid flux variability and an energy coverage extending significantly up to 20 TeV. This data set is used to constrain Lorentz invariance violation (LIV) using two independent channels: a temporal approach considers the possibility of an energy dependence in the arrival time of gamma-rays, whereas a spectral approach considers the possibility of modifications to the interaction of VHE gamma-rays with extragalactic background light (EBL) photons. The non-detection of energy-dependent time delays and the non-observation of deviations between the measured spectrum and that of a supposed power-law intrinsic spectrum with standard EBL attenuation are used independently to derive strong constraints on the energy scale of LIV (E-QG) in the subluminal scenario for linear and quadratic perturbations in the dispersion relation of photons. For the case of linear perturbations, the 95% confidence level limits obtained are E-QG,E-1 > 3.6 x 10(17) GeV using the temporal approach and E-QG,E-1 > 2.6 x 10(19) GeV using the spectral approach. For the case of quadratic perturbations, the limits obtained are E-QG,E-2 > 8.5 x 10(10) GeV using the temporal approach and E-QG,E-2 > 7.8 x 10(11) GeV using the spectral approach.

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    DESY, D-15738 Zeuthen, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany..
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    Univ Grenoble Alpes, Univ Savoie Mont Blanc, LAPP, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl Hautes Energies, LPNHE,CNRS,IN2P3, F-75252 Paris, France.;Univ Sao Paulo, Inst Fis Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    PSL Res Univ, Univ Paris Diderot, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum Astrophys 4, D-44780 Bochum, Germany..
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    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Grenoble Alpes, Univ Savoie Mont Blanc, LAPP, F-74000 Annecy, France..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    DESY, D-15738 Zeuthen, Germany..
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    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
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    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
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    DESY, D-15738 Zeuthen, Germany..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Grenoble Alpes, Univ Savoie Mont Blanc, LAPP, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Grenoble Alpes, Univ Savoie Mont Blanc, LAPP, F-74000 Annecy, France..
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    Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany..
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    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum Astrophys 4, D-44780 Bochum, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I
    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,CNRS,IN2P3, 10 Rue Alice Domon Leonie Duquet, F-75205 Paris, France..
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    PSL Res Univ, Univ Paris Diderot, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,CNRS,IN2P3, 10 Rue Alice Domon Leonie Duquet, F-75205 Paris, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, 5-1-5 Kashiwano Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernet, J-P
    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl Hautes Energies, LPNHE,CNRS,IN2P3, F-75252 Paris, France..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,CNRS,IN2P3, 10 Rue Alice Domon Leonie Duquet, F-75205 Paris, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, CEA Irfu,APC,CNRS,IN2P3, 10 Rue Alice Domon Leonie Duquet, F-75205 Paris, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl Hautes Energies, LPNHE,CNRS,IN2P3, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Grenoble Alpes, Univ Savoie Mont Blanc, LAPP, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, R. M.
    Stockholm Univ, Albanova Univ Ctr, Oskar Klein Ctr, Dept Phys, S-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zaborov, D.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    PSL Res Univ, Univ Paris Diderot, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Zefi, F.
    Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Kerr, M.
    Naval Res Lab, Space Sci Div, Washington, DC 20375 USA..
    Johnston, S.
    CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia..
    Shannon, R. M.
    CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia.;Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia.;OzGrav, ARC Ctr Excellence Gravitat Wave Discovery, Hawthorn, Vic, Australia..
    First ground-based measurement of sub-20 GeV to 100 GeV gamma-Rays from the Vela pulsar with HESS II2018Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 620, artikkel-id A66Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Aims. We report on the measurement and investigation of pulsed high-energy y-ray emission from the Vela pulsar, PSR B0833-45, based on observations with the largest telescope of H.E.S.S., CT5, in monoscopic mode, and on data obtained with the Fermi-LAT. Methods. Data from 40.3 h of observations carried out with the H.E.S.S. II array from 2013 to 2015 have been used. A dedicated very low-threshold event reconstruction and analysis pipeline was developed to achieve the lowest possible energy threshold. Eight years of Fermi-LAT data were analysed and also used as reference to validate the CT5 telescope response model and analysis methods. Results. A pulsed gamma-ray signal at a significance level of more than 15 sigma is detected from the P2 peak of the Vela pulsar light curve. Of a total of 15 835 events, more than 6000 lie at an energy below 20 GeV, implying a significant overlap between H.E.S.S. II-CT5 and the Fermi-LAT. While the investigation of the pulsar light curve with the LAT confirms characteristics previously known up to 20 GeV in the tens of GeV energy range, CT5 data show a change in the pulse morphology of P2, i.e. an extreme sharpening of its trailing edge, together with the possible onset of a new component at 3.4 sigma significance level. Assuming a power-law model for the P2 spectrum, an excellent agreement is found for the photon indices (Gamma similar or equal to 4.1) obtained with the two telescopes above 10 GeV and an upper bound of 8% is derived on the relative offset between their energy scales. Using data from both instruments, it is shown however that the spectrum of P2 in the 10-100 GeV has a pronounced curvature; this is a confirmation of the sub-exponential cut-off form found at lower energies with the LAT. This is further supported by weak evidence of an emission above 100 GeV obtained with CT5. In contrast, converging indications are found from both CT5 and LAT data for the emergence of a hard component above 50 GeV in the leading wing (LW2) of P2, which possibly extends beyond 100 GeV. Conclusions. The detection demonstrates the performance and understanding of CT5 from 100 GeV down to the sub-20 GeV domain, i.e. unprecedented low energy for ground-based gamma-ray astronomy. The extreme sharpening of the trailing edge of the P2 peak found in the H.E.S.S. II light curve of the Vela pulsar and the possible extension beyond 100 GeV of at least one of its features, LW2, provide further constraints to models of gamma-Ray emission from pulsars.

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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;Natl Acad Sci Republ Armenia, 24 Marshall Baghramian Ave, Yerevan 0019, Armenia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Aix Marseille Univ, CNRS, IN2P3, CPPM, F-13009 Marseille, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, D-44780 Bochum, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Barcelona IEEC UB, Inst Ciencies Cosmos ICC UB, Marti Franques 1, E-08028 Barcelona, Spain.;Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany.;Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Ctr Astron, Grudziadzka 5, PL-87100 Torun, Poland..
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    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
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    Univ Zurich, Inst Phys, Winterthurerstr 190, CH-8057 Zurich, Switzerland.;Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    DESY, D-15738 Zeuthen, Germany..
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    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
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    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
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    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
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    DESY, D-15738 Zeuthen, Germany..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I.
    DESY, D-15738 Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P. -O
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V.
    Natl Acad Sci Republ Armenia, 24 Marshall Baghramian Ave, Yerevan 0019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
    Santangelo, A.
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schutte, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    DESY, D-15738 Zeuthen, Germany.;Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernet, J. -P
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, APC AstroParticule & Cosmol, Observ Paris, CNRS,IN2P3,CEA Irfu,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CC 72, CNRS,IN2P3, Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3,Sorbonne Paris Cite, 4 Pl Jussieu, F-75252 Paris, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, Lab Annecy Phys Particules, CNRS,LAPP, F-74000 Annecy, France..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, R. M.
    Stockholm Univ, Dept Phys, Oskar Klein Ctr, Albanova Univ Ctr, SE-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe Kavli IPMU, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Zaborov, D.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    HESS observations of the flaring gravitationally lensed galaxy PKS 1830-2112019Inngår i: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 486, nr 3, s. 3886-3891Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    PKS 1830-211 is a known macrolensed quasar located at a redshift of z = 2.5. Its highenergy gamma-ray emission has been detected with the Fermi-Large Area Telescope (LAT) instrument and evidence for lensing was obtained by several authors from its high-energy data. Observations of PKS 1830-211 were taken with the High Energy Stereoscopic System (H.E.S.S.) array of Imaging Atmospheric Cherenkov Telescopes in 2014 August, following a flare alert by the Fermi-LAT Collaboration. The H.E.S.S observations were aimed at detecting a gamma-ray flare delayed by 20-27 d from the alert flare, as expected from observations at other wavelengths. More than 12 h of good-quality data were taken with an analysis threshold of similar to 67 GeV. The significance of a potential signal is computed as a function of the date and the average significance over the whole period. Data are compared to simultaneous observations by Fermi-LAT. No photon excess or significant signal is detected. An upper limit on PKS 1830-211 flux above 67 GeV is computed and compared to the extrapolation of the Fermi-LAT flare spectrum.

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    Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, D-44780 Bochum, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
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    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
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    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
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    Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
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    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
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    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
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    Univ Tokyo, Inst Adv Study, Kavli Inst Phys & Math Universe, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
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    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
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    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
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    DESY, D-15738 Zeuthen, Germany..
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    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Komin, Nu
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Kraus, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Lamanna, G.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Lau, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Lefaucheur, J.
    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Lemiere, A.
    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France..
    Lenain, J-P
    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
    Leser, E.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Lohse, T.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Lopez-Coto, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Lypova, I
    DESY, D-15738 Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Marandon, V
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Marcowith, A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Mariaud, C.
    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Maurin, G.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Meintjes, P. J.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Moore, C.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Murach, T.
    DESY, D-15738 Zeuthen, Germany..
    Nakashima, S.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    de Naurois, M.
    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan. RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I
    DESY, D-15738 Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
    Petrucci, P-O
    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Renaud, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Heidelberg Univ, ITA, Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V
    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schutte, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, Inst Adv Study, Kavli Inst Phys & Math Universe, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernet, J-P
    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, AstroParticule & Cosmol, APC, CNRS,IN2P3,CEA,Irfu,Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS, IN2P3, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Sorbonne Univ,Lab Phys Nucl & Hautes Energies,IN2, 4 Pl Jussieu, F-75252 Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Wagner, R. M.
    Stockholm Univ, Albanova Univ Ctr, Dept Phys, Oskar Klein Ctr, S-10691 Stockholm, Sweden..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, Inst Adv Study, Kavli Inst Phys & Math Universe, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Zaborov, D.
    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, PSL Res Univ, CNRS, Observ Paris,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Zefi, F.
    Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Particle transport within the pulsar wind nebula HESS J1825-1372019Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 621, artikkel-id A116Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context. We present a detailed view of the pulsar wind nebula (PWN) HESS J1825-137. We aim to constrain the mechanisms dominating the particle transport within the nebula, accounting for its anomalously large size and spectral characteristics. Aims. The nebula was studied using a deep exposure from over 12 years of H.E.S.S. I operation, together with data from H.E.S.S. II that improve the low-energy sensitivity. Enhanced energy-dependent morphological and spatially resolved spectral analyses probe the very high energy (VHE, E > 0.1 TeV) gamma-ray properties of the nebula. Methods. The nebula emission is revealed to extend out to 1.5 degrees from the pulsar, similar to 1.5 times farther than previously seen, making HESS J1825-137, with an intrinsic diameter of similar to 100 pc, potentially the largest gamma-ray PWN currently known. Characterising the strongly energy-dependent morphology of the nebula enables us to constrain the particle transport mechanisms. A dependence of the nebula extent with energy of R proportional to E alpha with alpha = -0.29 +/- 0.04(stat) +/- 0.05(sys) disfavours a pure diffusion scenario for particle transport within the nebula. The total gamma-ray flux of the nebula above 1 TeV is found to be (1.12 +/- 0.03(stat) +/- 0.25(sys)) +/- 10(-11) cm(-2) s(-1), corresponding to similar to 64% of the flux of the Crab nebula. Results. HESS J1825-137 is a PWN with clearly energy-dependent morphology at VHE gamma-ray energies. This source is used as a laboratory to investigate particle transport within intermediate-age PWNe. Based on deep observations of this highly spatially extended PWN, we produce a spectral map of the region that provides insights into the spectral variation within the nebula.

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    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;RAU, High Energy Astrophys Lab, 123 Hovsep Emin St, Yerevan 0051, Armenia..
    Benkhali, F. Ait
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Anguner, E. O.
    Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France..
    Arakawa, M.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Arcaro, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Armand, C.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Backes, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.;Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Barnard, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Becherini, Yvonne
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Berge, D.
    DESY, D-15738 Zeuthen, Germany..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Blackwell, R.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Bottcher, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Boisson, C.
    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
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    DESY, D-15738 Zeuthen, Germany..
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    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
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    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Brun, P.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
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    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
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    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
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    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
    Bylund, Tomas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
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    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
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    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Carosi, A.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Casanova, S.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Cerruti, M.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France.;Univ Barcelona, IEEC, ICC, Marti Franques 1, E-08028 Barcelona, Spain..
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    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Chand, T.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Chandra, S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Chaves, R. C. G.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Chen, A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Colafrancesco, S.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Condon, B.
    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Davids, I. D.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Deil, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Devin, J.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    deWilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Dirson, L.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Dmytriiev, A.
    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Donath, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Doroshenko, V
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Drury, L. O ' C
    Dyks, J.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Emery, G.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Ernenwein, J-P
    Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France..
    Eschbach, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Feijen, K.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Fegan, S.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Fiasson, A.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Fontaine, G.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fuessling, M.
    DESY, D-15738 Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Gallant, Y. A.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Gate, F.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Giavitto, G.
    DESY, D-15738 Zeuthen, Germany..
    Glawion, D.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Glicenstein, J. F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Grondin, M-H
    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Hahn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Haupt, M.
    DESY, D-15738 Zeuthen, Germany..
    Heinzelmann, G.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
    Hermann, G.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hinton, J. A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hofmann, W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Hoischen, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Holch, T. L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Holler, M.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Horns, D.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Huber, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Iwasaki, H.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Jacholkowska, A.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Jamrozy, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Jankowsky, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Jankowsky, F.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Jouvin, L.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Jung-Richardt, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kastendieck, M. A.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Katarzynski, K.
    Nicolaus Copernicus Univ, Ctr Astron Fac Phys Astron & Informat, Grudziadzka 5, PL-87100 Torun, Poland..
    Katsuragawa, M.
    Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, Inst Adv Study UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Khangulyan, D.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Khelifi, B.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    King, J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Klepser, S.
    DESY, D-15738 Zeuthen, Germany..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Komin, Nu
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Kosack, K.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Kostunin, D.
    DESY, D-15738 Zeuthen, Germany..
    Kraus, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Lamanna, G.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Lau, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Lemiere, A.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Lemoine-Goumard, M.
    Univ Bordeaux, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Lenain, J-P
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Leser, E.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Lohse, T.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Lopez-Coto, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Lypova, I
    DESY, D-15738 Zeuthen, Germany..
    Malyshev, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Marandon, V
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Marcowith, A.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Mariaud, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Marti-Devesa, G.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Marx, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Maurin, G.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Maxted, N. , I
    Meintjes, P. J.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Mitchell, A. M. W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohamed, M.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Mohrmann, L.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Moore, C.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Moulin, E.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Murach, T.
    DESY, D-15738 Zeuthen, Germany..
    Nakashima, S.
    RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    de Naurois, M.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Ndiyavala, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Niederwanger, F.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Niemiec, J.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Oakes, L.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    O'Brien, P.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England..
    Odaka, H.
    Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan..
    Ohm, S.
    DESY, D-15738 Zeuthen, Germany..
    Wilhelmi, E. de Ona
    DESY, D-15738 Zeuthen, Germany..
    Ostrowski, M.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Oya, I
    DESY, D-15738 Zeuthen, Germany..
    Panter, M.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Parsons, R. D.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Perennes, C.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Petrucci, P-O
    Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France..
    Peyaud, B.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Piel, Q.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Pita, S.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Poireau, V
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Noel, A. Priyana
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Prokhorov, D. A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Prokoph, H.
    DESY, D-15738 Zeuthen, Germany..
    Puehlhofer, G.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Punch, Michael
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Univ Paris Diderot, France.
    Quirrenbach, A.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Raab, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Rauth, R.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, A.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Reimer, O.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Renaud, M.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Rieger, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rinchiuso, L.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Romoli, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Rowell, G.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Rudak, B.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Ruiz-Velasco, E.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Sahakian, V
    Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Saito, S.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Sanchez, D. A.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Santangelo, A.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Sasaki, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Schlickeiser, R.
    Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, D-44780 Bochum, Germany..
    Schussler, F.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Schulz, A.
    DESY, D-15738 Zeuthen, Germany..
    Schutte, H.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Schwanke, U.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Schwemmer, S.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Seglar-Arroyo, M.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE).
    Seyffert, A. S.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Shafi, N.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Shilon, I
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Shiningayamwe, K.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Simoni, R.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Sinha, A.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Sol, H.
    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Specovius, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spir-Jacob, M.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Stawarz, L.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Steenkamp, R.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia..
    Stegmann, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany.;DESY, D-15738 Zeuthen, Germany..
    Steppa, C.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Takahashi, T.
    Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, Inst Adv Study UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Tavernet, J-P
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Tavernier, T.
    Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France..
    Taylor, A. M.
    DESY, D-15738 Zeuthen, Germany..
    Terrier, R.
    Univ Paris Diderot, CNRS, IN2P3,Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CEA,Irfu,Observ Paris, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France..
    Tibaldo, L.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Univ Toulouse, CNRS, IRAP, UPS,CNES, 9 Ave Colonel Roche, F-31028 Toulouse 4, France..
    Tiziani, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Tluczykont, M.
    Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Trichard, C.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Tsirou, M.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Tsuji, N.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    Tuffs, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Uchiyama, Y.
    Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan..
    van der Walt, D. J.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Eldik, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Rensburg, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    van Soelen, B.
    Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa..
    Vasileiadis, G.
    Univ Montpellier, CNRS, IN2P3, Lab Univ & Particules Montpellier, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France..
    Veh, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Venter, C.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Vincent, P.
    Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite, CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-751252 Paris, France..
    Vink, J.
    Univ Amsterdam, Anton Pannekoek Inst Astron, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Voisin, F.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Voelk, H. J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Vuillaume, T.
    Univ Grenoble Alpes, LAPP, Univ Savoie Mt Blanc, CNRS, F-74000 Annecy, France..
    Wadiasingh, Z.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Wagner, S. J.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    White, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Yang, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Yoneda, H.
    Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, Inst Adv Study UTIAS, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan..
    Zaborov, D.
    Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France..
    Zacharias, M.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    Zanin, R.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zdziarski, A. A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Zech, A.
    Univ Paris Diderot, CNRS, PSL Res Univ, LUTH,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Ziegler, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zorn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Zywucka, N.
    North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
    HESS and Suzaku observations of the Vela X pulsar wind nebula2019Inngår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 627, s. 1-16, artikkel-id A100Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Context. Pulsar wind nebulae (PWNe) represent the most prominent population of Galactic very-high-energy gamma-ray sources and are thought to be an efficient source of leptonic cosmic rays. Vela X is a nearby middle-aged PWN, which shows bright X-ray and TeV gamma-ray emission towards an elongated structure called the cocoon. Aims. Since TeV emission is likely inverse-Compton emission of electrons, predominantly from interactions with the cosmic microwave background, while X-ray emission is synchrotron radiation of the same electrons, we aim to derive the properties of the relativistic particles and of magnetic fields with minimal modelling. Methods. We used data from the Suzaku XIS to derive the spectra from three compact regions in Vela X covering distances from 0.3 to 4 pc from the pulsar along the cocoon. We obtained gamma-ray spectra of the same regions from H.E.S.S. observations and fitted a radiative model to the multi-wavelength spectra. Results. The TeV electron spectra and magnetic field strengths are consistent within the uncertainties for the three regions, with energy densities of the order 10(-12) erg cm(-3). The data indicate the presence of a cutoff in the electron spectrum at energies of similar to 100 TeV and a magnetic field strength of similar to 6 mu G. Constraints on the presence of turbulent magnetic fields are weak. Conclusions. The pressure of TeV electrons and magnetic fields in the cocoon is dynamically negligible, requiring the presence of another dominant pressure component to balance the pulsar wind at the termination shock. Sub-TeV electrons cannot completely account for the missing pressure, which may be provided either by relativistic ions or from mixing of the ejecta with the pulsar wind. The electron spectra are consistent with expectations from transport scenarios dominated either by advection via the reverse shock or by diffusion, but for the latter the role of radiative losses near the termination shock needs to be further investigated in the light of the measured cutoff energies. Constraints on turbulent magnetic fields and the shape of the electron cutoff can be improved by spectral measurements in the energy range greater than or similar to 10 keV.

  • 15.
    Panchal, N.
    et al.
    Homi Bhabha Natl Inst, India;Tata Inst Fundamental Res, India.
    Senniappan, Mohanraj
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för fysik och elektroteknik (IFE). Homi Bhabha Natl Inst, India;Tata Inst Fundamental Res, India.
    Kumar, A.
    Homi Bhabha Natl Inst, India;Tata Inst Fundamental Res, India.
    Dey, T.
    Homi Bhabha Natl Inst, India;Tata Inst Fundamental Res, India.
    Majumder, G.
    Tata Inst Fundamental Res, India.
    Shinde, R.
    Tata Inst Fundamental Res, India.
    Verma, P.
    Tata Inst Fundamental Res, India.
    Satyanarayana, B.
    Tata Inst Fundamental Res, India.
    Datar, V. M.
    Tata Inst Fundamental Res, India.
    A compact cosmic muon veto detector and possible use with the Iron Calorimeter detector for neutrinos2017Inngår i: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 12, artikkel-id T11002Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The motivation for a cosmic muon veto (CMV) detector is to explore the possibility of locating the proposed large Iron Calorimeter (ICAL) detector at the India based Neutrino Observatory (INO) at a shallow depth. An initial effort in that direction, through the assembly and testing of a similar to 1 m x 1 m x 0.3 m plastic scintillator based detector, is described. The plan for making a CMV detector for a smaller prototype mini-ICAL is also outlined.

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