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  • 101. Acero, F.
    et al.
    Aharonian, F.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Université Paris 7 Denis Diderot.
    Behera, B.
    Bernloehr, K.
    Bochow, A.
    Boisson, C.
    Bolmont, J.
    Borrel, V.
    Brucker, J.
    Brun, F.
    Brun, P.
    Buehler, R.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Fegan, S.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Gerbig, D.
    Giebels, B.
    Glicenstein, J. F.
    Glueck, B.
    Goret, P.
    Goering, D.
    Hauser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Hofverberg, P.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jahn, C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Klochkov, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, Nu.
    Kosack, K.
    Kossakowski, R.
    Lamanna, G.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Martineau-Huynh, O.
    Marcowith, A.
    Masbou, J.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Mehault, J.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Nicholas, B.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J-F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P. -O
    Pita, S.
    Puehlhofer, G.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Reimer, O.
    Renaud, M.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sikora, M.
    Skilton, J. L.
    Sol, H.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Stinzing, F.
    Superina, G.
    Szostek, A.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    Tluczykont, M.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    Detection of Gamma Rays from a Starburst Galaxy2009In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 326, no 5956, p. 1080-1082Article in journal (Refereed)
    Abstract [en]

    Starburst galaxies exhibit in their central regions a highly increased rate of supernovae, the remnants of which are thought to accelerate energetic cosmic rays up to energies of similar to 10(15) electron volts. We report the detection of gamma rays-tracers of such cosmic rays-from the starburst galaxy NGC 253 using the High Energy Stereoscopic System (H. E. S. S.) array of imaging atmospheric Cherenkov telescopes. The gamma-ray flux above 220 billion electron volts is F = (5.5 +/- 1.0(stat) +/- 2.8(sys)) x 10(-13) cm(-2) s(-1), implying a cosmic-ray density about three orders of magnitude larger than that in the center of the Milky Way. The fraction of cosmic-ray energy channeled into gamma rays in this starburst environment is five times as large as that in our Galaxy.

  • 102. Acero, F.
    et al.
    Aharonian, F.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Behera, B.
    Bernloehr, K.
    Bochow, A.
    Boisson, C.
    Bolmont, J.
    Borrel, V.
    Brucker, J.
    Brun, F.
    Brun, P.
    Buehler, R.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Gerbig, D.
    Giebels, B.
    Glicenstein, J. F.
    Glueck, B.
    Goret, P.
    Goering, D.
    Hauser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jahn, C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Klochkov, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, Nu.
    Kosack, K.
    Kossakowski, R.
    Lamanna, G.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Martineau-Huynh, O.
    Marcowith, A.
    Masbou, J.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Mehault, J.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Nicholas, B.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J. -F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P. -O
    Pita, S.
    Puehlhofer, G.
    Punch, Michael
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Reimer, O.
    Renaud, M.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sikora, M.
    Skilton, J. L.
    Sol, H.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Stinzing, F.
    Superina, G.
    Szostek, A.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    Tluczykont, M.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-6222011In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 525, p. A45-Article in journal (Refereed)
    Abstract [en]

    Context. The detection of gamma-rays in the very-high-energy (VHE) range (100 GeV-100 TeV) offers the possibility of studying the parent population of ultrarelativistic particles found in astrophysical sources, so it is useful for understanding the underlying astrophysical processes in nonthermal sources. Aims. The discovery of the VHE gamma-ray source HESS J1507-622 is reported and possibilities regarding its nature are investigated. Methods. The H. E. S. S. array of imaging atmospheric Cherenkov telescopes (IACTs) has a high sensitivity compared with previous instruments (similar to 1% of the Crab flux in 25 h observation time for a 5 sigma point-source detection) and has a large field of view (similar to 5 degrees in diameter). HESS J1507-622 was discovered within the ongoing H. E. S. S. survey of the inner Galaxy, and the source was also studied by means of dedicated multiwavelength observations. Results. A Galactic gamma-ray source, HESS J1507-622, located similar to 3.5 degrees. from the Galactic plane was detected with a statistical significance >9 sigma. Its energy spectrum is well fitted by a power law with spectral index Gamma = 2.24 +/- 0.16(stat) +/- 0.20(sys) and a flux above 1 TeV of (1.5 +/- 0.4(stat) +/- 0.3(sys)) x 10(-12) cm(-2) s(-1). Possible interpretations (considering both hadronic and leptonic models) of the VHE gamma-ray emission are discussed in the absence of an obvious counterpart.

  • 103. Acero, F.
    et al.
    Aharonian, F.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Behera, B.
    Bernloehr, K.
    Bochow, A.
    Boisson, C.
    Bolmont, J.
    Borrel, V.
    Brucker, J.
    Brun, F.
    Brun, P.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Conrad, J.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Eger, P.
    Espigat, P.
    Fallon, L.
    Farnier, C.
    Fegan, S.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Gerbig, D.
    Giebels, B.
    Glicenstein, J. F.
    Glueck, B.
    Goret, P.
    Goering, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Hofverberg, P.
    Holleran, M.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jahn, C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Klochkov, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, Nu.
    Kosack, K.
    Kossakowski, R.
    Lamanna, G.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Marcowith, A.
    Masbou, J.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Mehault, J.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Nicholas, B.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J-F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P. -O
    Pita, S.
    Puehlhofer, G.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Reimer, O.
    Renaud, M.
    de los Reyes, R.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Ryde, F.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schoenwald, A.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sushch, I.
    Sikora, M.
    Skilton, J. L.
    Sol, H.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Stinzing, F.
    Superina, G.
    Szostek, A.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    Tluczykont, M.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Vorobiov, S.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    HESS upper limits on very high energy gamma-ray emission from the microquasar GRS 1915+1052009In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 508, no 3, p. 1135-1140Article in journal (Refereed)
    Abstract [en]

    Context. High energy particles reside in the relativistic jets of microquasars, making them possible sources of very high energy radiation (VHE, > 100 GeV). Detecting this emission would provide a new handle on jet physics. Aims. Observations of the microquasar GRS 1915+105 with the HESS telescope array were undertaken in 2004-2008 to search for VHE emission. Methods. Stereoscopic imaging of Cherenkov radiation from extensive air showers is used to reconstruct the energy and direction of the incident gamma rays. Results. There is no evidence for a VHE gamma-ray signal either from the direction of the microquasar or its vicinity. An upper limit of 6.1 x 10(-13) ph cm(-2) s(-1) (99.9% confidence level) is set on the photon flux above 410 GeV, equivalent to a VHE luminosity of similar to 10(34) erg s(-1) at 11 kpc. Conclusions. The VHE to X-ray luminosity ratio in GRS 1915+105 is at least four orders of magnitude lower than the ratio observed in gamma-ray binaries. The VHE radiative efficiency of the compact jet is less than 0.01% based on its estimated total power of 10(38) erg s(-1). Particle acceleration in GRS 1915+105 is not efficient at high energies and/or the magnetic field is too strong. It is also possible that VHE gamma-rays are produced by GRS 1915+105, but the emission is highly time-dependent.

  • 104.
    Acero, F.
    et al.
    CEA Saclay, France.
    Aloisio, R.
    Arcetri Observatory, Italy ; University of L'Aquila, Italy ; Gran Sasso Science Institute, Italy.
    Amans, J.
    Paris Observatory, France.
    Amato, E.
    Arcetri Observatory, Italy.
    Antonelli, L. A.
    Rome Observatory, Italy.
    Aramo, C.
    INFN Sezione di Napoli, Italy.
    Armstrong, T.
    Durham University, UK.
    Arqueros, F.
    Complutense University of Madrid, Spain.
    Asano, K.
    University of Tokyo, Japan.
    Ashley, M.
    University of New South Wales, Australia.
    Backes, M.
    Univ Namibia, Namibia.
    Balazs, C.
    Monash Univ, Australia.
    Balzer, A.
    Univ Amsterdam, Netherlands.
    Bamba, A.
    Univ Tokyo, Japan.
    Barkov, M.
    RIKEN, Inst Phys & Chem Res, Hirosawa, Wako, Saitama 3510198, Japan..
    Barrio, J. A.
    Univ Complutense Madrid, Grp Altas Energias, Av Complutense, Madrid, Spain..
    Benbow, W.
    Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02180 USA..
    Bernloehr, K.
    Max Planck Inst Kernphys, Saupfercheckweg 1, Heidelberg, Germany..
    Beshley, V.
    Inst Appl Problems Mech & Math, 3B Naukova St, Lvov, Ukraine..
    Bigongiari, C.
    Osserv Astron Torino, INAF, Corso Fiume 4, Turin, Italy..
    Biland, A.
    Swiss Fed Inst Technol, Inst Particle Phys, Schafmattstr 20, Zurich, Switzerland..
    Bilinsky, A.
    Ivan Franko Natl Univ Lviv, Astron Observ, 1 Univ Ska St, UA-79000 City Of Lviv, Ukraine..
    Bissaldi, E.
    Politecn Bari, Bari, Italy.;INFN Bari, Bari, Italy..
    Biteau, J.
    Univ Paris 11, IPNO, IN2P3, CNRS, 15 Rue Georges Clemenceau, Orsay, France.;Univ Paris 11, UMR 8608, 15 Rue Georges Clemenceau, Orsay, France..
    Blanch, O.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Blasi, P.
    Osserv Astrofis Arcetri, Largo E Fermi 5, Florence, Italy..
    Blazek, J.
    Acad Sci Czech Republic, Inst Phys, Slovance, Prague 18221 8, Czech Republic..
    Boisson, C.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Bonanno, G.
    INAF Osservatorio Astrofis Catania, Via S Sofia 78, Catania, Italy..
    Bonardi, A.
    Radboud Univ Nijmegen, POB 9010, GL Nijmegen, Netherlands..
    Bonavolonta, C.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia,Ed G, Naples, Italy..
    Bonnoli, G.
    INAF Osservatorio Astron Brera, Via Brera 28, Milan, Italy..
    Braiding, C.
    Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia..
    Brau-Nogue, S.
    IRAP, 9 Ave Colonel Roche,BP 44346, Toulouse 4, France..
    Bregeon, J.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, Montpellier 5, France..
    Brown, A. M.
    Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, UK;Univ Durham, Ctr Adv Instrumentat, South Rd, Durham DH1 3LE, UK.
    Bugaev, V.
    Washington Univ, Dept Phys, St Louis, MO 63130 USA..
    Bulgarelli, A.
    Ist Astrofis Spaziale & Fis Cosm Bologna, Via Piero Gobetti 101, Bologna, Italy..
    Bulik, T.
    Univ Warsaw, Fac Phys, Ul Hoza 69, Warsaw, Poland..
    Burton, M.
    Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia..
    Burtovoi, A.
    INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, Padua, Italy..
    Busetto, G.
    Univ Padua, Dipartimento Fis, Via Marzolo 8, Padua, Italy..
    Bottcher, M.
    North West Univ, Ctr Space Res, Potchefstroom Campus, Potchefstroom, South Africa..
    Cameron, R.
    Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.;Stanford Univ, Dept Phys, SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA..
    Capalbi, M.
    INAF Ist Astrofis Spaziale & Fis Cosm Palermo, Via U La Malfa 153, Palermo, Italy..
    Caproni, A.
    UCS, NAT, Rua Galvao Bueno 8687,Bloco B,Sala 16, Sao Paulo, Brazil..
    Caraveo, P.
    Ist Astrofis Spaziale & Fis Cosm, Via Bassini 15, Milan, Italy..
    Carosi, R.
    Ist Nazl Fis Nucl, Sez Pisa, Largo Pontecorvo 3, Pisa, Italy..
    Cascone, E.
    INAF Osservatorio Astron Brera, Via Brera 28, Milan, Italy..
    Cerruti, M.
    Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02180 USA..
    Chaty, S.
    CEA Saclay, CEA, IRFU, SAp, Bat 709, Gif Sur Yvette, France..
    Chen, A.
    Univ Witwatersrand, 1 Jan Smuts Ave, Johannesburg, South Africa..
    Chen, X.
    Pontificia Univ Catolica Chile, Avda Libertador Bernardo OHiggins 340, Santiago, Chile..
    Chernyakova, M.
    Dublin City Univ, Dublin 9, Ireland..
    Chikawa, M.
    Kindai Univ, Dept Phys, Higashiosaka, Osaka 5778502, Japan..
    Chudoba, J.
    Acad Sci Czech Republic, Inst Phys, Slovance, Prague 18221 8, Czech Republic..
    Cohen-Tanugi, J.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, Montpellier 5, France..
    Colafrancesco, S.
    Univ Witwatersrand, 1 Jan Smuts Ave, Johannesburg, South Africa..
    Conforti, V.
    Ist Astrofis Spaziale & Fis Cosm Bologna, Via Piero Gobetti 101, Bologna, Italy..
    Contreras, J. L.
    Univ Complutense Madrid, Grp Altas Energias, Av Complutense, Madrid, Spain..
    Costa, A.
    INAF Osservatorio Astrofis Catania, Via S Sofia 78, Catania, Italy..
    Cotter, G.
    Univ Oxford, Dept Phys, 1 Keble Rd, Oxford OX1 3NP, UK.
    Covino, S.
    INAF Osservatorio Astron Brera, Via Brera 28, Milan, Italy..
    Covone, G.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia,Ed G, Naples, Italy..
    Cumani, P.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Cusumano, G.
    INAF Ist Astrofis Spaziale & Fis Cosm Palermo, Via U La Malfa 153, Palermo, Italy..
    D'Ammando, F.
    INAF IRA, INAF, Ist Radioastron, Via Gobetti 101, Bologna, Italy..
    D'Urso, D.
    INFN, Sez Perugia, Via A Pascoli, Perugia, Italy..
    Daniel, M.
    Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02180 USA..
    Dazzi, F.
    Cherenkov Telescope Array Observ, Saupfercheckweg 1, Heidelberg, Germany..
    De Angelis, A.
    Univ Padua, Dipartimento Fis, Via Marzolo 8, Padua, Italy..
    De Cesare, G.
    Ist Astrofis Spaziale & Fis Cosm Bologna, Via Piero Gobetti 101, Bologna, Italy..
    De Franco, A.
    Univ Oxford, Dept Phys, 1 Keble Rd, Oxford OX1 3NP, UK.
    De Frondat, F.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Dal Pino, E. M. de Gouveia
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, R Matao 1226, Sao Paulo, Brazil..
    De Lisio, C.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia,Ed G, Naples, Italy..
    Lopez, R. de los Reyes
    Max Planck Inst Kernphys, Saupfercheckweg 1, Heidelberg, Germany..
    De Lotto, B.
    Univ Udine, Via Sci 208, Udine, Italy.;INFN, Sez Trieste, Via Sci 208, Udine, Italy..
    de Naurois, M.
    Ecole Polytech, CNRS, UMR 7638, Lab Leprince Ringuet, Palaiseau, France..
    De Palma, F.
    INFN, Sez Bari, Via Orabona 4, Bari, Italy..
    Del Santo, M.
    INAF Ist Astrofis Spaziale & Fis Cosm Palermo, Via U La Malfa 153, Palermo, Italy..
    Delgado, C.
    CIEMAT, Avda Complutense 40, Madrid, Spain..
    della Volpe, D.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, Geneva 4, Switzerland..
    Di Girolamo, T.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia,Ed G, Naples, Italy..
    Di Giulio, C.
    INFN, Sez Roma Tor Vergata, Via Ric Sci 1, Rome, Italy..
    Di Pierro, F.
    Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, Turin, Italy..
    Di Venere, L.
    Univ Bari, Bari, Italy.;INFN Bari, Bari, Italy..
    Doro, M.
    Univ Padua, Dipartimento Fis, Via Marzolo 8, Padua, Italy..
    Dournaux, J.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Dumas, D.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Dwarkadas, V.
    Univ Chicago, Enrico Fermi Inst, 5640 South Ellis Ave, Chicago, IL 60637 USA..
    Diaz, C.
    CIEMAT, Avda Complutense 40, Madrid, Spain..
    Ebr, J.
    Acad Sci Czech Republic, Inst Phys, Slovance, Prague 18221 8, Czech Republic..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Golm, Germany..
    Einecke, S.
    TU Dortmund Univ, Dept Phys, Otto Hahn Str 4, Dortmund, Germany..
    Elsaesser, D.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Campus Hubland Nord,Emil Fischer Str 31, Wurzburg, Germany..
    Eschbach, S.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, Erlangen, Germany..
    Falceta-Goncalves, D.
    Univ Sao Paulo, Escola Arles Ciencias & Humanidades, Rua Arlindo Bettio 1000, Sao Paulo, Brazil..
    Fasola, G.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Fedorova, E.
    Taras Shevchenko Natl Univ Kyiv, Astron Observ, 60 Volodymyrska St, Kiev, Ukraine..
    Fernandez-Barral, A.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Ferrand, G.
    RIKEN, Inst Phys & Chem Res, Hirosawa, Wako, Saitama 3510198, Japan..
    Fesquet, M.
    CEA Saclay, CEA, IRFU, SEDI, Bat 141, Gif Sur Yvette, France..
    Fiandrini, E.
    INFN, Sez Perugia, Via A Pascoli, Perugia, Italy..
    Fiasson, A.
    Univ Savoie, CNRS, IN2P3, Lab Annecy le Vieux Phys Particules, 9 Chemin Bellevue BP 110, Annecy Le Vieux, France..
    Filipovic, M. D.
    Western Sydney Univ, Locked Bag 1797, Penrith, NSW 2751, Australia..
    Fioretti, V.
    Ist Astrofis Spaziale & Fis Cosm Bologna, Via Piero Gobetti 101, Bologna, Italy..
    Font, L.
    Univ Autonoma Barcelona, Dept Fis, Unitat Fis Radiac, Bellaterra, Spain.;Univ Autonoma Barcelona, CERES IEEC, Bellaterra, Spain.;Edifici Cc,Campus UAB, Bellaterra, Spain..
    Fontaine, G.
    Ecole Polytech, CNRS, UMR 7638, Lab Leprince Ringuet, Palaiseau, France..
    Franco, F. J.
    Univ Complutense Madrid, Grp Elect, Ave Complutense Madrid, Spain..
    Freixas Coromina, L.
    CIEMAT, Avda Complutense 40, Madrid, Spain..
    Fujita, Y.
    Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan..
    Fukui, Y.
    Nagoya Univ, Dept Phys & Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan..
    Funk, S.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, Erlangen, Germany..
    Forster, A.
    Max Planck Inst Kernphys, Saupfercheckweg 1, Heidelberg, Germany..
    Gadola, A.
    Univ Zurich, Inst Phys, Winterthurerstr 190, Zurich, Switzerland..
    Lopez, R. Garcia
    Inst Astrofis Canarias, Via Lactea, Tenerife, Spain..
    Garczarczyk, M.
    DESY, Platanenallee 6, Zeuthen, Germany..
    Giglietto, N.
    Politecn Bari, Bari, Italy.;INFN Bari, Bari, Italy..
    Giordano, F.
    Univ Bari, Bari, Italy.;INFN Bari, Bari, Italy..
    Giuliani, A.
    Ist Astrofis Spaziale & Fis Cosm, Via Bassini 15, Milan, Italy..
    Glicenstein, J.
    CEA Saclay, CEA, IRFU, SPP, Bat 141, Gif Sur Yvette, France..
    Gnatyk, R.
    Taras Shevchenko Natl Univ Kyiv, Astron Observ, 60 Volodymyrska St, Kiev, Ukraine..
    Goldoni, P.
    Univ Paris Diderot, APC, CNRS IN2P3, CEA Irfu,Obs Paris,Sorbonne Paris Cite, 10 Rue Alice Domon & Leonie Duquet, Paris 13, France..
    Grabarczyk, T.
    Acad Comp Ctr CYFRONET AGH, Ul Nawojki 11, Krakow, Poland..
    Graciani, R.
    Univ Barcelona, Inst Ciencies Cosmos, IEEC UB, Dept Fis Quant & Astrofis, Marti & Franques 1, Barcelona, Spain..
    Graham, J.
    Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, UK;Univ Durham, Ctr Adv Instrumentat, South Rd, Durham DH1 3LE, UK.
    Grandi, P.
    Ist Astrofis Spaziale & Fis Cosm Bologna, Via Piero Gobetti 101, Bologna, Italy..
    Granot, J.
    Open Univ Israel, Dept Nat Sci, 1 Univ Rd,POB 808, Raanana, Israel..
    Green, A. J.
    Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia..
    Griffiths, S.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Gunji, S.
    Yamagata Univ, Dept Phys, Yamagata, Yamagata 9908560, Japan..
    Hakobyan, H.
    Univ Tecn Federico Santa Maria, Ave Espana 1680, Valparaiso, Chile..
    Hara, S.
    Yamanashi Gakuin Univ, Fac Management Informat, Kofu, Yamanashi 4008575, Japan..
    Hassan, T.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Hayashida, M.
    Univ Tokyo, Inst Cosm Ray Res, Kashi Wwanoha, Kashiwa, Chiba 2778582, Japan..
    Heller, M.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, Geneva 4, Switzerland..
    Helo, J. C.
    Univ Tecn Federico Santa Maria, Ave Espana 1680, Valparaiso, Chile..
    Hinton, J.
    Max Planck Inst Kernphys, Saupfercheckweg 1, Heidelberg, Germany..
    Hnatyk, B.
    Taras Shevchenko Natl Univ Kyiv, Astron Observ, 60 Volodymyrska St, Kiev, Ukraine..
    Huet, J.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Huetten, M.
    DESY, Platanenallee 6, Zeuthen, Germany..
    Humensky, T. B.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Hussein, M.
    Univ Manitoba, 540 Machray Hall, Winnipeg, MB R3T 2N2, Canada..
    Horandel, J.
    Radboud Univ Nijmegen, POB 9010, GL Nijmegen, Netherlands..
    Ikeno, Y.
    Tokai Univ, Dept Phys, Kita Kaname, Hiratsuka, Kanagawa 2591292, Japan..
    Inada, T.
    Univ Tokyo, Inst Cosm Ray Res, Kashi Wwanoha, Kashiwa, Chiba 2778582, Japan..
    Inome, Y.
    Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan..
    Inoue, S.
    RIKEN, Inst Phys & Chem Res, Hirosawa, Wako, Saitama 3510198, Japan..
    Inoue, T.
    Natl Astron Observ Japan, Div Theoret Astron, Osawa Mitaka, Tokyo 1818588, Japan..
    Inoue, Y.
    Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Yoshinodai, Sagamihara, Kanagawa 2525210, Japan..
    Ioka, K.
    Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan..
    Iori, M.
    INFN, Sez Roma La Sapienza, Ple Aldo Moro 2, Rome, Italy..
    Jacquemier, J.
    Univ Savoie, CNRS, IN2P3, Lab Annecy le Vieux Phys Particules, 9 Chemin Bellevue BP 110, Annecy Le Vieux, France..
    Janecek, P.
    Acad Sci Czech Republic, Inst Phys, Slovance, Prague 18221 8, Czech Republic..
    Jankowsky, D.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, Erlangen, Germany..
    Jung, I.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, Erlangen, Germany..
    Kaaret, P.
    Univ Iowa, Dept Phys & Astron, Van Allen Hall, Iowa City, IA 52242 USA..
    Katagiri, H.
    Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan..
    Kimeswenger, S.
    Univ Catolica Norte, Ave Angamos 0610, Antofagasta, Chile..
    Kimura, S.
    Tokai Univ, Dept Phys, Kita Kaname, Hiratsuka, Kanagawa 2591292, Japan..
    Knodlseder, J.
    IRAP, 9 Ave Colonel Roche,BP 44346, Toulouse 4, France..
    Koch, B.
    Pontificia Univ Catolica Chile, Avda Libertador Bernardo OHiggins 340, Santiago, Chile..
    Kocot, J.
    Acad Comp Ctr CYFRONET AGH, Ul Nawojki 11, Krakow, Poland..
    Kohri, K.
    KEK High Energy Accelerator Org, Inst Particle & Nucl Studies, Oho, Tsukuba, Ibaraki 3050801, Japan..
    Komin, N.
    Univ Witwatersrand, 1 Jan Smuts Ave,Johannesburg, South Africa..
    Konno, Y.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Kosack, K.
    CEA Saclay, CEA, IRFU, SAp, Bat 709, Gif Sur Yvette, France..
    Koyama, S.
    Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Yoshinodai, Sagamihara, Kanagawa 2525210, Japan..
    Kraus, M.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, Erlangen, Germany..
    Kubo, H.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Mezek, G. Kukec
    Univ Nova Gorica, Lab Astroparticle Phys, Vipayska 13, Nova Gorica 5000, Slovenia..
    Kushida, J.
    Tokai Univ, Dept Phys, Kita Kaname, Hiratsuka, Kanagawa 2591292, Japan..
    La Palombara, N.
    Ist Astrofis Spaziale & Fis Cosm, Via Bassini 15, Milan, Italy..
    Lalik, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, Krakow, Poland..
    Lamanna, G.
    Univ Savoie, CNRS, IN2P3, Lab Annecy le Vieux Phys Particules, 9 Chemin Bellevue BP 110, Annecy Le Vieux, France..
    Landt, H.
    Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, UK;Univ Durham, Ctr Adv Instrumentat, South Rd, Durham DH1 3LE, UK.
    Lapington, J.
    Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, UK.
    Laporte, P.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Lee, S.
    Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Yoshinodai, Sagamihara, Kanagawa 2525210, Japan..
    Lees, J.
    Univ Savoie, CNRS, IN2P3, Lab Annecy le Vieux Phys Particules, 9 Chemin Bellevue BP 110, Annecy Le Vieux, France..
    Lefaucheur, J.
    Observ Paris, CNRS, LUTH, 5 Pl Jules Janssen, Meudon, France.;Observ Paris, CNRS, GEPI, 5 Pl Jules Janssen, Meudon, France..
    Lenain, J. -P
    Leto, G.
    INAF Osservatorio Astrofis Catania, Via S Sofia 78, Catania, Italy..
    Lindfors, E.
    Univ Turku, Tuorla Observ, Piikkio, Finland..
    Lohse, T.
    Humboldt Univ, Dept Phys, Newtonstr 15, Berlin, Germany..
    Lombardi, S.
    Osserv Astron Roma, INAF, Via Frascati 33, Monte Porzio Catone, Italy..
    Longo, F.
    Univ Trieste, Trieste, Italy.;INFN, Sezione Trieste, Trieste, Italy..
    Lopez, M.
    Univ Complutense Madrid, Grp Altas Energias, Av Complutense S-N, Madrid, Spain..
    Lucarelli, F.
    Osserv Astron Roma, INAF, Via Frascati 33, Monte Porzio Catone, Italy..
    Luque-Escamilla, P. L.
    Univ Jaen, Escuela Politecn Super Jaen, Campus Las Lagunillas, Edif A3, Jaen, Spain..
    Lopez-Coto, R.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Maccarone, M. C.
    INAF Ist Astrofis Spaziale & Fis Cosm Palermo, Via U La Malfa 153, Palermo, Italy..
    Maier, G.
    DESY, Platanenallee 6, Zeuthen, Germany..
    Malaguti, G.
    Ist Astrofis Spaziale & Fis Cosm Bologna, Via Piero Gobetti 101, Bologna, Italy..
    Mandat, D.
    Acad Sci Czech Republic, Inst Phys, Slovance, Prague 18221 8, Czech Republic..
    Maneva, G.
    BAS, Inst Nucl Res & Nucl Energy, 72 Blvd Tsarigradsko Chaussee, Sofia 1784, Bulgaria..
    Mangano, S.
    CIEMAT, Avda Complutense 40, Madrid, Spain..
    Marcowith, A.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, Montpellier 5, France..
    Marti, J.
    Univ Jaen, Escuela Politecn Super Jaen, Campus Las Lagunillas,Edif A3, Jaen, Spain..
    Martinez, M.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB,Bellaterra, Barcelona, Spain..
    Martinez, G.
    CIEMAT, Avda Complutense 40, Madrid, Spain..
    Masuda, S.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Maurin, G.
    Univ Savoie, CNRS, IN2P3, Lab Annecy le Vieux Phys Particules, 9 Chemin Bellevue BP 110, Annecy Le Vieux, France..
    Maxted, N.
    Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia..
    Melioli, C.
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, R Matao 1226, Sao Paulo, Brazil..
    Mineo, T.
    INAF Ist Astrofis Spaziale & Fis Cosm Palermo, Via U La Malfa 153, Palermo, Italy..
    Mirabal, N.
    Univ Complutense Madrid, Grp Altas Energias, Av Complutense Madrid, Spain..
    Mizuno, T.
    Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan..
    Moderski, R.
    Polish Acad Sci, Copernicus Astron Ctr, Ul Bartycka 18, Warsaw, Poland..
    Mohammed, M.
    Heidelberg Univ, Landessternwarte, Heidelberg, Germany..
    Montaruli, T.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, Geneva 4, Switzerland..
    Moralejo, A.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Mori, K.
    Miyazaki Univ, Dept Appl Phys, Gakuen Kibana Dai Nishi, Miyazaki 8892192, Japan..
    Morlino, G.
    Univ Aquila, Dipartimento Sci Fis & Chim, INFN, Via Vetoio 1, Laquila, Italy.;Gran Sasso Sci Inst, Via Vetoio 1, Laquila, Italy..
    Morselli, A.
    INFN, Sez Roma Tor Vergata, Via Ric Sci 1, Italy..
    Moulin, E.
    CEA Saclay, CEA, IRFU, SPP, Bat 141, Gif Sur Yvette, France..
    Mukherjee, R.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Mundell, C.
    Univ Bath, Bath BA2 7AY, Avon, UK.
    Muraishi, H.
    Kitasato Univ, Sch Allied Hlth Sci, Sagamihara, Kanagawa 2288555, Japan..
    Murase, K.
    Univ Tokyo, Inst Cosm Ray Res, Kashi Wwanoha, Kashiwa, Chiba 2778582, Japan..
    Nagataki, S.
    RIKEN, Inst Phys & Chem Res, Hirosawa, Wako, Saitama 3510198, Japan..
    Nagayoshi, T.
    Saitama Univ, Grad Sch Sci & Engn, Sakura Ku, 255 Simo Ohkubo, Saitama City, Saitama 3388570, Japan..
    Naito, T.
    Yamanashi Gakuin Univ, Fac Management Informat, Kofu, Yamanashi 4008575, Japan..
    Nakajima, D.
    Univ Tokyo, Inst Cosm Ray Res, Kashi Wwanoha, Kashiwa, Chiba 2778582, Japan.;Max Planck Inst Phys & Astrophys, Fohringer Ring 6, Munich, Germany..
    Nakamori, T.
    Yamagata Univ, Dept Phys, Yamagata, Yamagata 9908560, Japan..
    Nemmen, R.
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, R Matao 1226, Sao Paulo, Brazil..
    Niemiec, J.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, Krakow, Poland..
    Nieto, D.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Nievas-Rosillo, M.
    Univ Complutense Madrid, Grp Altas Energias, Av Complutense, Madrid, Spain..
    Nikolajuk, M.
    Univ Bialystok, Fac Phys, Ul K Ciolkowskiego 1L, Bialystok, Poland..
    Nishijima, K.
    Tokai Univ, Dept Phys, Kita Kaname, Hiratsuka, Kanagawa 2591292, Japan..
    Noda, K.
    Univ Tokyo, Inst Cosm Ray Res, Kashi Wwanoha, Kashiwa, Chiba 2778582, Japan.;Max Planck Inst Phys & Astrophys, Fohringer Ring 6, Munich, Germany..
    Nogues, L.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Nosek, D.
    Charles Univ Prague, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 18000 8, Czech Republic..
    Novosyadlyj, B.
    Ivan Franko Natl Univ Lviv, Astron Observ, 1 Univ Ska St, City Of Lviv, Ukraine..
    Nozaki, S.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Ohira, Y.
    Aoyama Gakuin Univ, Dept Math & Phys, Sagamihara, Kanagawa 2298558, Japan..
    Ohishi, M.
    Univ Tokyo, Inst Cosm Ray Res, Kashi Wwanoha, Kashiwa, Chiba 2778582, Japan..
    Ohm, S.
    DESY, Platanenallee 6, Zeuthen, Germany..
    Okumura, A.
    Nagoya Univ, Inst Space Earth Environm Res, Chikusa Ku, Nagoya, Aichi 4648601, Japan..
    Ong, R. A.
    Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA..
    Orito, R.
    Tokushima Univ, Grad Sch Sci & Technol, Tokushima 7708506, Japan..
    Orlati, A.
    INAF IRA, INAF, Ist Radioastron, Via Gobetti 101, Bologna, Italy..
    Ostrowski, M.
    Jagiellonian Univ, Fac Phys Astron & Appl Comp Sci, Ul Prof Stanislawa Lojasiewicza 11, Krakow, Poland..
    Oya, I.
    DESY, Platanenallee 6, Zeuthen, Germany..
    Padovani, M.
    Univ Montpellier, CNRS, IN2P3, Lab Univers & Particules Montpellier, CC 72,Pl Eugene Bataillon, Montpellier 5, France..
    Palacio, J.
    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
    Palatka, M.
    Acad Sci Czech Republic, Inst Phys, Slovance, Prague 18221 8, Czech Republic..
    Paredes, J. M.
    Univ Barcelona, Inst Ciencies Cosmos, IEEC UB, Dept Fis Quant & Astrofis, Marti & Franques 1, Barcelona, Spain..
    Pavy, S.
    Ecole Polytech, CNRS, UMR 7638, Lab Leprince Ringuet, Palaiseau, France..
    Pe'er, A.
    Max Planck Inst Phys & Astrophys, Fohringer Ring 6, Munich, Germany..
    Persic, M.
    Univ Udine, Via Sci 208, Udine, Italy.;INFN, Sez Trieste, Via Sci 208, Udine, Italy.;Osserv Astron Trieste, Via Sci 208, Udine, Italy.;Ist Nazl Fis Nucl, Sez Trieste, Via Sci 208, Udine, Italy..
    Petrucci, P.
    Univ Joseph Fourier, INSU CNRS, Inst Planetol & Astrophys Grenoble, 621 Ave Cent,Domaine Univ, Grenoble 9, France..
    Petruk, O.
    Inst Appl Problems Mech & Math, 3B Naukova St, Lvov, Ukraine..
    Pisarski, A.
    Univ Bialystok, Fac Phys, Ul K Ciolkowskiego 1L, Bialystok, Poland..
    Pohl, M.
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    Univ Barcelona, Inst Ciencies Cosmos, IEEC UB, Dept Fis Quant & Astrofis, Marti & Franques 1, Barcelona, Spain..
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    IFAE, Barcelona Inst Sci & Technol, Campus UAB, Bellaterra, Barcelona, Spain..
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    CIEMAT, Avda Complutense 40, Madrid, Spain..
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    Univ Complutense Madrid, Grp Altas Energias, Av Complutense, Madrid, Spain..
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    Prospects for Cherenkov Telescope Array Observations of the Young Supernova Remnant RX J1713.7-39462017In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 840, no 2, article id 74Article in journal (Refereed)
    Abstract [en]

    We perform simulations for future Cherenkov Telescope Array (CTA) observations of RX J1713.7-3946, a young supernova remnant (SNR) and one of the brightest sources ever discovered in very high energy (VHE) gamma rays. Special attention is paid to exploring possible spatial (anti) correlations of gamma rays with emission at other wavelengths, in particular X-rays and CO/H I emission. We present a series of simulated images of RX J1713.7-3946 for CTA based on a set of observationally motivated models for the gamma-ray emission. In these models, VHE gamma rays produced by high-energy electrons are assumed to trace the nonthermal X-ray emission observed by XMM-Newton, whereas those originating from relativistic protons delineate the local gas distributions. The local atomic and molecular gas distributions are deduced by the NANTEN team from CO and H I observations. Our primary goal is to show how one can distinguish the emission mechanism(s) of the gamma rays (i.e., hadronic versus leptonic, or a mixture of the two) through information provided by their spatial distribution, spectra, and time variation. This work is the first attempt to quantitatively evaluate the capabilities of CTA to achieve various proposed scientific goals by observing this important cosmic particle accelerator.

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    The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories. An international collaboration has formed with more than 1000 members from 27 countries in Europe, Asia, Africa and North and South America. In 2010 the CTA Consortium completed a Design Study and started a three-year Preparatory Phase which leads to production readiness of CTA in 2014. In this paper we introduce the science goals and the concept of CTA, and provide an overview of the project. (C) 2013 Elsevier B.V. All rights reserved.

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    Univ Paris Saclay, Univ Paris Diderot, Sorbonne Paris Cite, CNRS,AIM,CEA, F-91191 Gif Sur Yvette, France..
    Chen, A.
    Univ Witwatersrand, 1 Jan Smuts Ave, ZA-2000 Johannesburg, South Africa..
    Chernyakova, M.
    Dublin City Univ, Ctr Astrophys & Relat, Sch Phys Sci, Dublin 9, Ireland..
    Chiaro, G.
    INAF, Ist Astrofis Spaziale & Fis Cosm Milano, Via Bassini 15, I-20133 Milan, Italy..
    Cieslar, M.
    Univ Warsaw, Dept Phys, Astron Observ, Aleje Ujazdowskie 4, PL-00478 Warsaw, Poland..
    Colak, S. M.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Conforti, V
    INAF, Osservatorio Astrofis & Scienza Spazio Bologna, Via Piero Gobetti 101, I-40129 Bologna, Italy..
    Congiu, E.
    INAF, Osservatorio Astron Brera, Via Brera 28, I-20121 Milan, Italy..
    Contreras, J. L.
    Univ Complutense Madrid, EMFTEL Dept, E-28040 Madrid, Spain.;Univ Complutense Madrid, IPARCOS, E-28040 Madrid, Spain..
    Cortina, J.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Costa, A.
    INAF, Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy..
    Costantini, H.
    Aix Marseille Univ, CPPM, IN2P3, CNRS, Marseille, France.;163 Ave Luminy, F-13288 Marseille 09, France..
    Cotter, G.
    Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England..
    Cristofari, P.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Cumani, P.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Cusumano, G.
    INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Via U Malfa 153, I-90146 Palermo, Italy..
    D'Ai, A.
    INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Via U Malfa 153, I-90146 Palermo, Italy..
    D'Ammando, F.
    INAF, Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy..
    Dangeon, L.
    PSL Res Univ, Observ Paris, CNRS, LUTH & GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Da Vela, P.
    Ist Nazl Fis Nucl, Sez Pisa, I-56217 Pisa, Italy..
    Dazzi, F.
    Cherenkov Telescope Array Observ, Saupfercheckweg 1, D-69117 Heidelberg, Germany..
    De Angelis, A.
    Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy.;Univ Padua, Via Marzolo 8, I-35131 Padua, Italy..
    De Caprio, V
    INAF, Osservatorio Astron Capodimonte, Via Salita Moiariello 16, I-80131 Naples, Italy..
    de Cassia dos Anjos, R.
    Univ Fed Parana Setor Palotina, Dept Engenharias & Exatas, Rua Pioneiro 2153, BR-85950000 Jardim Dallas, Parana, Brazil..
    De Frondat, F.
    PSL Res Univ, Observ Paris, CNRS, LUTH & GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    de Gouveia Dal Pino, E. M.
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Cidade Univ,R Matao 1226, BR-05508090 Sao Paulo, SP, Brazil..
    De Lotto, B.
    Ist Nazl Fis Nucl, Sez Trieste, Via Sci 208, I-33100 Udine, Italy.;Univ Udine, Via Sci 208, I-33100 Udine, Italy..
    De Martino, D.
    Univ Cruzeiro Sul, Nucl Astrofis Teor, Rua Galvao Bueno 8687,Bloco B,Sala 16, BR-01506000 Libertade, SP, Brazil..
    de Naurois, M.
    Univ Paris Saclay, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Wilhelmi, E. de Ona
    Univ Paris Saclay, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    de Palma, F.
    Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy..
    de Souza, V
    Univ Sao Paulo, Inst Fis Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil..
    Del Santo, M.
    INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Via U Malfa 153, I-90146 Palermo, Italy..
    Delgado, C.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    della Volpe, D.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, CH-41211 Geneva, Switzerland..
    Di Girolamo, T.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia Ed G, I-80126 Naples, Italy..
    Di Pierro, F.
    Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy..
    Di Venere, L.
    Ist Nazl Fis Nucl, Sez Bari, Via Orabona 4, I-70124 Bari, Italy.;Univ Bari, Via Orabona 4, I-70124 Bari, Italy..
    Diaz, C.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Diebold, S.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, Sorbonne Paris Cite, Obs Paris, IRFU,CNRS,IN2P3,APC,CEA, Paris, France.;10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Dmytriiev, A.
    PSL Res Univ, Observ Paris, CNRS, LUTH & GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Prester, D. Dominis
    Univ Rijeka, Dept Phys, Radmile Matejc 2, Rijeka 51000, Croatia..
    Donini, A.
    Ist Nazl Fis Nucl, Sez Trieste, Via Sci 208, I-33100 Udine, Italy.;Univ Udine, Via Sci 208, I-33100 Udine, Italy..
    Dorner, D.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Campus Hubland Nord,Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Doro, M.
    Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy.;Univ Padua, Via Marzolo 8, I-35131 Padua, Italy..
    Dournaux, J-L
    PSL Res Univ, Observ Paris, CNRS, LUTH & GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Ebr, J.
    Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221 8, Czech Republic..
    Ekoume, T. R. N.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, CH-41211 Geneva, Switzerland..
    Elsaesser, D.
    TU Dortmund Univ, Dept Phys, Otto Hahn Str 4, D-44221 Dortmund, Germany..
    Emery, G.
    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl & Hautes Energies, Sorbonne Paris Cite,CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75005 Paris, France..
    Falceta-Goncalves, D.
    Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Rua Arlindo Bettio 1000, BR-03828000 Sao Paulo, Brazil..
    Fedorova, E.
    Taras Shevchenko Natl Univ Kyiv, Astron Observ, 3 Observatorna St, UA-04053 Kiev, Ukraine..
    Fegan, S.
    Univ Paris Saclay, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Feng, Q.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Ferrand, G.
    Inst Phys & Chem Res, RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan..
    Fiandrini, E.
    Ist Nazl Fis Nucl, Sez Perugia, Via A Pascoli, I-06123 Perugia, Italy.;Univ Perugia, Via A Pascoli, I-06123 Perugia, Italy..
    Fiasson, A.
    Univ Savoie Mt Blanc, Univ Grenoble Alpes, LAPP, CNRS,IN2P3, F-74000 Annecy, France.;9 Chemin Bellevue,BP 110, F-74941 Annecy, France..
    Filipovic, M.
    Western Sydney Univ, Locked Bag 1797, Penrith, NSW 1797, Australia..
    Fioretti, V
    INAF, Osservatorio Astrofis & Scienza Spazio Bologna, Via Piero Gobetti 101, I-40129 Bologna, Italy..
    Fiori, M.
    INAF, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy..
    Flis, S.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Fonseca, M. , V
    Fontaine, G.
    Univ Paris Saclay, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3,UMR 7638, F-91128 Palaiseau, France..
    Freixas Coromina, L.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Fukami, S.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Fukui, Y.
    Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan..
    Funk, S.
    Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fuessling, M.
    Cherenkov Telescope Array Observ, Saupfercheckweg 1, D-69117 Heidelberg, Germany..
    Gaggero, D.
    Univ Amsterdam, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands.;Univ Autonoma Madrid, Inst Fis Teor, CSIC, Campus Cantoblanco,C Nicolas Cabrera 13-75, E-28049 Madrid, Spain.;Univ Autonoma Madrid, Dept Fis Teor, Campus Cantoblanco,C Nicolas Cabrera 13-75, E-28049 Madrid, Spain..
    Galanti, G.
    INAF, Osservatorio Astron Brera, Via Brera 28, I-20121 Milan, Italy..
    Garcia Lopez, R. J.
    Univ La Laguna, Inst Astrofis Canarias, Tenerife, Spain.;Univ La Laguna, Dept Astrofis, Tenerife, Spain..
    Garczarczyk, M.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Gascon, D.
    Univ Barcelona, Inst Ciencies Cosmos, Dept Fis Quant & Astrofis, IEEC UB, Marti & Franques 1, E-08028 Barcelona, Spain..
    Gasparetto, T.
    Ist Nazl Fis Nucl, Sez Trieste, Via Valerio 2 1, I-34127 Trieste, Italy.;Univ Trieste, Via Valerio 2 1, I-34127 Trieste, Italy..
    Gaug, M.
    Univ Autonoma Barcelona, Dept Fis, Unitat Fis Radiac, E-08193 Bellaterra, Spain.;Univ Autonoma Barcelona, CERES IEEC, E-08193 Bellaterra, Spain.;Edif C3,Campus UAB, Bellaterra 08193, Spain..
    Ghalumyan, A.
    Yerevan Phys Inst, Alikhanyan Natl Sci Lab, 2 Alikhanyan Bros St, Yerevan 0036, Armenia..
    Gianotti, F.
    INAF, Osservatorio Astrofis & Scienza Spazio Bologna, Via Piero Gobetti 101, I-40129 Bologna, Italy..
    Giavitto, G.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Giglietto, N.
    Ist Nazl Fis Nucl, Sez Bari, Via Orabona 4, I-70124 Bari, Italy.;Politecn Bari, Via Orabona 4, I-70124 Bari, Italy..
    Giordano, F.
    Ist Nazl Fis Nucl, Sez Bari, Via Orabona 4, I-70124 Bari, Italy.;Univ Bari, Via Orabona 4, I-70124 Bari, Italy..
    Giroletti, M.
    INAF, Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy..
    Gironnet, J.
    PSL Res Univ, Observ Paris, CNRS, LUTH & GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Glicenstein, J-F
    Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France..
    Gnatyk, R.
    Taras Shevchenko Natl Univ Kyiv, Astron Observ, 3 Observatorna St, UA-04053 Kiev, Ukraine..
    Goldoni, P.
    Univ Paris Diderot, Sorbonne Paris Cite, Obs Paris, IRFU,CNRS,IN2P3,APC,CEA, Paris, France.;10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Gonzalez, J. M.
    Univ Andres Bello UNAB, Republ 252, Santiago, Region Metropol, Chile..
    Gonzalez, M. M.
    Univ Nacl Autonoma Mexico, Ciudad De Mexico 04510, Mexico..
    Gourgouliatos, K. N.
    Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, England.;Univ Durham, Ctr Adv Instrumentat, South Rd, Durham DH1 3LE, England..
    Grabarczyk, T.
    Acad Comp Ctr CYFRONET AGH, Ul Nawojki 11, PL-30950 Krakow, Poland..
    Granot, J.
    Open Univ Israel, Dept Nat Sci, 1 Univ Rd,POB 808, IL-43537 Raanana, Israel..
    Green, D.
    Max Planck Inst Phys & Astrophys, Fuhringer Ring 6, D-80805 Munich, Germany..
    Greenshaw, T.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Grondin, M-H
    Univ Bordeaux, CENBG, IN2P3, CNRS,UMR 5797, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France..
    Gueta, O.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Hadasch, D.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Hassan, T.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Hayashida, M.
    Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan..
    Heller, M.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, CH-41211 Geneva, Switzerland..
    Hervet, O.
    Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, 1156 High St, Santa Cruz, CA 95064 USA.;Univ Calif Santa Cruz, Dept Phys, 1156 High St, Santa Cruz, CA 95064 USA..
    Hinton, J.
    Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany..
    Hiroshima, N.
    High Energy Accelerator Res Org, Inst Particle & Nucl Studies, KEK, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan..
    Hnatyk, B.
    Taras Shevchenko Natl Univ Kyiv, Astron Observ, 3 Observatorna St, UA-04053 Kiev, Ukraine..
    Hofmann, W.
    Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany..
    Horvath, P.
    Palacky Univ Olomouc, Fac Sci, RCPTM, 17 Listopadu 1192-12, Olomouc 77146, Czech Republic..
    Hrabovsky, M.
    Palacky Univ Olomouc, Fac Sci, RCPTM, 17 Listopadu 1192-12, Olomouc 77146, Czech Republic..
    Hrupec, D.
    Josip Juraj Strossmayer Univ Osijek, Trg Svetog Trojstva 3, Osijek 31000, Croatia..
    Humensky, T. B.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Huetten, M.
    Max Planck Inst Phys & Astrophys, Fuhringer Ring 6, D-80805 Munich, Germany..
    Inada, T.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Iocco, F.
    Univ Estadual Paulista, ICTP South Amer Inst Fundamental Res, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz 271, BR-01140070 Sao Paulo, Brazil..
    Ionica, M.
    Ist Nazl Fis Nucl, Sez Perugia, Via A Pascoli, I-06123 Perugia, Italy..
    Iori, M.
    Ist Nazl Fis Nucl, Sez Roma, Piazza Aldo Moro 5 1, I-00185 Rome, Italy..
    Iwamura, Y.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Jamrozy, M.
    Jagiellonian Univ, Fac Phys Astron & Appl Comp Sci, Ul Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Janecek, P.
    Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221 8, Czech Republic..
    Jankowsky, D.
    Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Jean, P.
    Univ Paul Sabatier, Inst Rech Astrophys & Planetol, CNRS, INSU, 9 Ave Colonel Roche,BP 44346, F-31028 Toulouse 4, France..
    Jouvin, L.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Jurysek, J.
    Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221 8, Czech Republic.;Palacky Univ Olomouc, Fac Sci, RCPTM, 17 Listopadu 1192-12, Olomouc 77146, Czech Republic..
    Kaaret, P.
    Univ Iowa, Dept Phys & Astron, Van Allen Hall, Iowa City, IA 52242 USA..
    Kadowaki, L. H. S.
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Cidade Univ,R Matao 1226, BR-05508090 Sao Paulo, SP, Brazil..
    Karkar, S.
    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl & Hautes Energies, Sorbonne Paris Cite,CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75005 Paris, France..
    Kerszberg, D.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Khelifi, B.
    Univ Paris Diderot, Sorbonne Paris Cite, Obs Paris, IRFU,CNRS,IN2P3,APC,CEA, Paris, France.;10 Rue Alice Damon & Leonie Duquet, F-75205 Paris 13, France..
    Kieda, D.
    Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA..
    Kimeswenger, S.
    Leopold Franzens Univ, Inst Astro & Teilchenphys, Tech Str 25-8, A-6020 Innsbruck, Austria..
    Kluzniak, W.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Knapp, J.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Knodlseder, J.
    Univ Paul Sabatier, Inst Rech Astrophys & Planetol, CNRS, INSU, 9 Ave Colonel Roche,BP 44346, F-31028 Toulouse 4, France..
    Kobayashi, Y.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Koch, B.
    Pontificia Univ Catolica Chile, Avda Libertador Bernardo O Higgins 340, Santiago, Chile..
    Kocot, J.
    Acad Comp Ctr CYFRONET AGH, Ul Nawojki 11, PL-30950 Krakow, Poland..
    Komin, N.
    Univ Witwatersrand, 1 Jan Smuts Ave, ZA-2000 Johannesburg, South Africa..
    Kong, A.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Kowal, G.
    Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Rua Arlindo Bettio 1000, BR-03828000 Sao Paulo, Brazil..
    Krause, M.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Kubo, H.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Kushida, J.
    Tokai Univ, Dept Phys, 4-1-1 Kita Kaname, Hiratsuka, Kanagawa 2591292, Japan..
    Kushwaha, P.
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Cidade Univ,R Matao 1226, BR-05508090 Sao Paulo, SP, Brazil..
    La Parola, V
    INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Via U Malfa 153, I-90146 Palermo, Italy..
    La Rosa, G.
    INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Via U Malfa 153, I-90146 Palermo, Italy..
    Lallena Arquillo, M.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Lang, R. G.
    Univ Sao Paulo, Inst Fis Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil..
    Lapington, J.
    Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England..
    Le Blanc, O.
    PSL Res Univ, Observ Paris, CNRS, LUTH & GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Lefaucheur, J.
    Univ Paris Saclay, Univ Paris Diderot, Sorbonne Paris Cite, CNRS,AIM,CEA, F-91191 Gif Sur Yvette, France..
    Leigui de Oliveira, M. A.
    Univ Fed ABC, Ctr Ciencias Naturais & Humanas, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP, Brazil..
    Lemoine-Goumard, M.
    Univ Bordeaux, CENBG, IN2P3, CNRS,UMR 5797, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France..
    Lenain, J-P
    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl & Hautes Energies, Sorbonne Paris Cite,CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75005 Paris, France..
    Leto, G.
    INAF, Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy..
    Lico, R.
    INAF, Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy..
    Lindfors, E.
    Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-21500 Piikkio, Finland..
    Lohse, T.
    Humboldt Univ, Dept Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Lombardi, S.
    INAF, Osservatorio Astronom Roma, Via Frascati 33, I-00040 Monte Porzio Catone, Italy..
    Longo, F.
    Ist Nazl Fis Nucl, Sez Trieste, Via Valerio 2 1, I-34127 Trieste, Italy.;Univ Trieste, Via Valerio 2 1, I-34127 Trieste, Italy..
    Lopez, A.
    Univ La Laguna, Inst Astrofis Canarias, Tenerife, Spain.;Univ La Laguna, Dept Astrofis, Tenerife, Spain..
    Lopez, M.
    Univ Complutense Madrid, EMFTEL Dept, E-28040 Madrid, Spain.;Univ Complutense Madrid, IPARCOS, E-28040 Madrid, Spain..
    Lopez-Oramas, A.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Lopez-Coto, R.
    Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy.;Univ Padua, Via Marzolo 8, I-35131 Padua, Italy..
    Loporchio, S.
    Ist Nazl Fis Nucl, Sez Bari, Via Orabona 4, I-70124 Bari, Italy.;Univ Bari, Via Orabona 4, I-70124 Bari, Italy..
    Luque-Escamilla, P. L.
    Univ Jaen, Escuela Politecn Super Jaen, Campus Lagunillas S-N,Edif A3, Jaen 23071, Spain..
    Lyard, E.
    Univ Geneva, ISDC Data Ctr Astrophys, Observ Geneva, Chemin Ecogia 16, CH-1290 Versoix, Switzerland..
    Maccarone, M. C.
    INAF, Ist Astrofis Spaziale & Fis Cosm Palermo, Via U Malfa 153, I-90146 Palermo, Italy..
    Mach, E.
    Polish Acad Sci, Hernyk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Maggio, C.
    Univ Autonoma Barcelona, Dept Fis, Unitat Fis Radiac, E-08193 Bellaterra, Spain.;Univ Autonoma Barcelona, CERES IEEC, E-08193 Bellaterra, Spain.;Edif C3,Campus UAB, Bellaterra 08193, Spain..
    Majumdar, P.
    Saha Inst Nucl Phys, Kolkata 700064, India..
    Malaguti, G.
    INAF, Osservatorio Astrofis & Scienza Spazio Bologna, Via Piero Gobetti 101, I-40129 Bologna, Italy..
    Mallamaci, M.
    Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy.;Univ Padua, Via Marzolo 8, I-35131 Padua, Italy..
    Mandat, D.
    Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221 8, Czech Republic..
    Maneva, G.
    Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, 72 Boul Tsarigradsko Chaussee, BU-1784 Sofia, Bulgaria..
    Manganaro, M.
    Univ Rijeka, Dept Phys, Radmile Matejc 2, Rijeka 51000, Croatia..
    Mangano, S.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Marculewicz, M.
    Univ Bialystok, Fac Phys, Ul K Ciolkowskiego 1L, PL-15254 Bialystok, Poland..
    Mariotti, M.
    Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy.;Univ Padua, Via Marzolo 8, I-35131 Padua, Italy..
    Marti, J.
    Univ Jaen, Escuela Politecn Super Jaen, Campus Lagunillas S-N,Edif A3, Jaen 23071, Spain..
    Martinez, M.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Martinez, G.
    CIEMAT, Avda Complutense 40, E-28040 Madrid, Spain..
    Martinez-Huerta, H.
    Univ Sao Paulo, Inst Fis Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP, Brazil..
    Masuda, S.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Maxted, N.
    Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia..
    Mazin, D.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan.;Max Planck Inst Phys & Astrophys, Fuhringer Ring 6, D-80805 Munich, Germany..
    Meunier, J-L
    Univ Paris Diderot, Sorbonne Univ, Lab Phys Nucl & Hautes Energies, Sorbonne Paris Cite,CNRS,IN2P3,LPNHE, 4 Pl Jussieu, F-75005 Paris, France..
    Meyer, M.
    Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.;Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, SIAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA..
    Micanovic, S.
    Univ Rijeka, Dept Phys, Radmile Matejc 2, Rijeka 51000, Croatia..
    Millul, R.
    INAF, Osservatorio Astron Brera, Via Brera 28, I-20121 Milan, Italy..
    Minaya, I. A.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Mitchell, A.
    Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland..
    Mizuno, T.
    Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Higashihiroshima, Hiroshima 7398526, Japan..
    Moderski, R.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Mohrmann, L.
    Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Montaruli, T.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, CH-41211 Geneva, Switzerland..
    Moralejo, A.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Morcuende, D.
    Univ Complutense Madrid, EMFTEL Dept, E-28040 Madrid, Spain.;Univ Complutense Madrid, IPARCOS, E-28040 Madrid, Spain..
    Morlino, G.
    Univ Aquila, Dipartimento Sci Fis & Chim, Ist Nazl Fis Nucl, Via Vetoio 1,Viale Crispi 7, I-67100 Laquila, Italy.;Gran Sasso Sci Inst, Via Vetoio 1,Viale Crispi 7, I-67100 Laquila, Italy..
    Morselli, A.
    Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Moulin, E.
    Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France..
    Mukherjee, R.
    Columbia Univ, Dept Phys, 538 West 120th St, New York, NY 10027 USA..
    Munar, P.
    INAF, Ist Astrofis & Planetol Spaziali IAPS, Via Fosso Cavaliere 100, I-00133 Rome, Italy..
    Mundell, C.
    Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England..
    Murach, T.
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Nagai, A.
    Univ Geneva, Dept Phys Nucl & Corpusculaire, 24 Rue Gen Dufour, CH-41211 Geneva, Switzerland..
    Nagayoshi, T.
    Saitama Univ, Grad Sch Sci & Engn, Sakura Ku, 255 Simo Ohkubo, Saitama, Saitama 3388570, Japan..
    Naito, T.
    Yamanashi Gakuin Univ, Fac Management Informat, Kofu, Yamanashi 4008575, Japan..
    Nakamori, T.
    Yamagata Univ, Dept Phys, Yamagata, Yamagata 9908560, Japan..
    Nemmen, R.
    Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Cidade Univ,R Matao 1226, BR-05508090 Sao Paulo, SP, Brazil..
    Niemiec, J.
    Polish Acad Sci, Hernyk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Nieto, D.
    Univ Complutense Madrid, EMFTEL Dept, E-28040 Madrid, Spain.;Univ Complutense Madrid, IPARCOS, E-28040 Madrid, Spain..
    Rosillo, M. Nievas
    DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Nikolajuk, M.
    Univ Bialystok, Fac Phys, Ul K Ciolkowskiego 1L, PL-15254 Bialystok, Poland..
    Ninci, D.
    Barcelona Inst Sci & Technol, Inst Fis Altes Energies, Campus UAB, Bellaterra 08193, Barcelona, Spain..
    Nishijima, K.
    Tokai Univ, Dept Phys, 4-1-1 Kita Kaname, Hiratsuka, Kanagawa 2591292, Japan..
    Noda, K.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Nosek, D.
    Charles Univ Prague, Inst Particle & Nucl Phys, V Holesovickach 2, Prague 18000 8, Czech Republic..
    Noethe, M.
    TU Dortmund Univ, Dept Phys, Otto Hahn Str 4, D-44221 Dortmund, Germany..
    Nozaki, S.
    Kyoto Univ, Grad Sch Sci, Div Phys & Astron, Sakyo Ku, Kyoto 6068502, Japan..
    Ohishi, M.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Ohtani, Y.
    Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778582, Japan..
    Okumura, A.
    Nagoya Univ, Inst Space Earth Environm Res, Chikusa Ku, Nagoya, Aichi 4648601, Japan..
    Ong, R. A.
    Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA..
    Punch, Michael
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Univ Paris Diderot, France.
    Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout2019In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 111, p. 35-53Article in journal (Refereed)
    Abstract [en]

    The Cherenkov Telescope Array (CTA) is the major next-generation observatory for ground-based veryhigh-energy gamma-ray astronomy. It will improve the sensitivity of current ground-based instruments by a factor of five to twenty, depending on the energy, greatly improving both their angular and energy resolutions over four decades in energy (from 20 GeV to 300 TeV). This achievement will be possible by using tens of imaging Cherenkov telescopes of three successive sizes. They will be arranged into two arrays, one per hemisphere, located on the La Palma island (Spain) and in Paranal (Chile). We present here the optimised and final telescope arrays for both CTA sites, as well as their foreseen performance, resulting from the analysis of three different large-scale Monte Carlo productions.

  • 107. Ackermann, M.
    et al.
    Ajello, M.
    Albert, A.
    Baldini, L.
    Barbiellini, G.
    Bechtol, K.
    Bellazzini, R.
    Berenji, B.
    Blandford, R. D.
    Bloom, E. D.
    Bonamente, E.
    Borgland, A. W.
    Brigida, M.
    Buehler, R.
    Buson, S.
    Caliandro, G. A.
    Cameron, R. A.
    Caraveo, P. A.
    Casandjian, J. M.
    Cecchi, C.
    Charles, E.
    Chekhtman, A.
    Chiang, J.
    Ciprini, S.
    Claus, R.
    Cohen-Tanugi, J.
    Conrad, J.
    D’Ammando, F.
    de Palma, F.
    Dermer, C. D.
    do Couto e Silva, E.
    Drell, P. S.
    Drlica-Wagner, A.
    Edmonds, Y.
    Essig, R.
    Favuzzi, C.
    Fegan, S. J.
    Focke, W. B.
    Fukazawa, Y.
    Funk, S.
    Fusco, P.
    Gargano, F.
    Gasparrini, D.
    Germani, S.
    Giglietto, N.
    Giordano, F.
    Giroletti, M.
    Glanzman, T.
    Godfrey, G.
    Grenier, I. A.
    Guiriec, S.
    Gustafsson, M.
    Hadasch, D.
    Hayashida, M.
    Horan, D.
    Hughes, R. E.
    Kamae, T.
    Knödlseder, J.
    Kuss, M.
    Lande, J.
    Lionetto, A. M.
    Llena Garde, M.
    Longo, F.
    Loparco, F.
    Lovellette, M. N.
    Lubrano, P.
    Mazziotta, M. N.
    Michelson, P. F.
    Mitthumsiri, W.
    Mizuno, T.
    Moiseev, A. A.
    Monte, C.
    Monzani, M. E.
    Morselli, A.
    Moskalenko, I. V.
    Murgia, S.
    Naumann-Godo, M.
    Norris, J. P.
    Nuss, E.
    Ohsugi, T.
    Okumura, A.
    Orlando, E.
    Ormes, J. F.
    Paneque, D.
    Panetta, J. H.
    Pesce-Rollins, M.
    Piron, F.
    Pivato, G.
    Porter, T. A.
    Prokhorov, Dmitry
    Stanford Univ, USA.
    Rainò, S.
    Rando, R.
    Razzano, M.
    Reimer, O.
    Roth, M.
    Sbarra, C.
    Scargle, J. D.
    Sgrò, C.
    Siskind, E. J.
    Snyder, A.
    Spinelli, P.
    Suson, D. J.
    Takahashi, H.
    Tanaka, T.
    Thayer, J. G.
    Thayer, J. B.
    Tibaldo, L.
    Tinivella, M.
    Torres, D. F.
    Tosti, G.
    Troja, E.
    Vandenbroucke, J.
    Vasileiou, V.
    Vianello, G.
    Vitale, V.
    Waite, A. P.
    Winer, B. L.
    Wood, K. S.
    Yang, Z.
    Zimmer, S.
    Fermi LAT search for dark matter in gamma-ray lines and the inclusive photon spectrum2012In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 86, no 2, article id 022002Article in journal (Refereed)
    Abstract [en]

    Dark matter particle annihilation or decay can produce monochromatic gamma-ray lines and contribute to the diffuse gamma-ray background. Flux upper limits are presented for gamma-ray spectral lines from 7 to 200 GeV and for the diffuse gamma-ray background from 4.8 GeV to 264 GeV obtained from two years of Fermi Large Area Telescope data integrated over most of the sky. We give cross-section upper limits and decay lifetime lower limits for dark matter models that produce gamma-ray lines or contribute to the diffuse spectrum, including models proposed as explanations of the PAMELA and Fermi cosmic-ray data.

  • 108. Ackermann, M.
    et al.
    Ajello, M.
    Allafort, A.
    Baldini, L.
    Ballet, J.
    Barbiellini, G.
    Bastieri, D.
    Belfiore, A.
    Bellazzini, R.
    Berenji, B.
    Blandford, R. D.
    Bloom, E. D.
    Bonamente, E.
    Borgland, A. W.
    Bottacini, E.
    Brigida, M.
    Bruel, P.
    Buehler, R.
    Buson, S.
    Caliandro, G. A.
    Cameron, R. A.
    Caraveo, P. A.
    Casandjian, J. M.
    Cecchi, C.
    Chekhtman, A.
    Cheung, C. C.
    Chiang, J.
    Ciprini, S.
    Claus, R.
    Cohen-Tanugi, J.
    de Angelis, A.
    de Palma, F.
    Dermer, C. D.
    do Couto e Silva, E.
    Drell, P. S.
    Dumora, D.
    Favuzzi, C.
    Fegan, S. J.
    Focke, W. B.
    Fortin, P.
    Fukazawa, Y.
    Fusco, P.
    Gargano, F.
    Germani, S.
    Giglietto, N.
    Giordano, F.
    Giroletti, M.
    Glanzman, T.
    Godfrey, G.
    Grenier, I. A.
    Guillemot, L.
    Guiriec, S.
    Hadasch, D.
    Hanabata, Y.
    Harding, A. K.
    Hayashida, M.
    Hayashi, K.
    Hays, E.
    Jóhannesson, G.
    Johnson, A. S.
    Kamae, T.
    Katagiri, H.
    Kataoka, J.
    Kerr, M.
    Knödlseder, J.
    Kuss, M.
    Lande, J.
    Latronico, L.
    Lee, S. -H
    Longo, F.
    Loparco, F.
    Lott, B.
    Lovellette, M. N.
    Lubrano, P.
    Martin, P.
    Mazziotta, M. N.
    McEnery, J. E.
    Mehault, J.
    Michelson, P. F.
    Mitthumsiri, W.
    Mizuno, T.
    Monte, C.
    Monzani, M. E.
    Morselli, A.
    Moskalenko, I. V.
    Murgia, S.
    Naumann-Godo, M.
    Nolan, P. L.
    Norris, J. P.
    Nuss, E.
    Ohsugi, T.
    Okumura, A.
    Orlando, E.
    Ormes, J. F.
    Ozaki, M.
    Paneque, D.
    Parent, D.
    Pesce-Rollins, M.
    Pierbattista, M.
    Piron, F.
    Pohl, M.
    Prokhorov, Dmitry
    Stanford University, USA..
    Rainò, S.
    Rando, R.
    Razzano, M.
    Reposeur, T.
    Ritz, S.
    Parkinson, P. M. S.
    Sgrò, C.
    Siskind, E. J.
    Smith, P. D.
    Spinelli, P.
    Strong, A. W.
    Takahashi, H.
    Tanaka, T.
    Thayer, J. G.
    Thayer, J. B.
    Thompson, D. J.
    Tibaldo, L.
    Torres, D. F.
    Tosti, G.
    Tramacere, A.
    Troja, E.
    Uchiyama, Y.
    Vandenbroucke, J.
    Vasileiou, V.
    Vianello, G.
    Vitale, V.
    Waite, A. P.
    Wang, P.
    Winer, B. L.
    Wood, K. S.
    Yang, Z.
    Zimmer, S.
    Bontemps, S.
    A Cocoon of Freshly Accelerated Cosmic Rays Detected by Fermi in the Cygnus Superbubble2011In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 334, no 6059, p. 1103-1107Article in journal (Refereed)
    Abstract [en]

    The origin of Galactic cosmic rays is a century-long puzzle. Indirect evidence points to their acceleration by supernova shockwaves, but we know little of their escape from the shock and their evolution through the turbulent medium surrounding massive stars. Gamma rays can probe their spreading through theambient gas and radiation fields. The Fermi Large Area Telescope (LAT) has observed the star-forming region of Cygnus X. The 1- to 100-gigaelectronvolt images reveal a 50-parsec-wide cocoon of freshly accelerated cosmic rays that flood the cavities carved by the stellar winds and ionization fronts from young stellar clusters. It provides an example to study the youth of cosmic rays in a superbubble environment before they merge into the older Galactic population.

  • 109. Actis, M.
    et al.
    Agnetta, G.
    Aharonian, F.
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    Allan, D.
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    Artmann, S.
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    Asorey, H.
    Baehr, J.
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    Balis, D.
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    Barnstedt, J.
    de Almeida, U. Barres
    Barrio, J. A.
    Basso, S.
    Bastieri, D.
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    Becerra, J.
    Becherini, Yvonne
    École Polytechnique.
    Bechtol, K.
    Becker, J.
    Beckmann, V.
    Bednarek, W.
    Behera, B.
    Beilicke, M.
    Belluso, M.
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    Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. Ground-based gamma-ray astronomy has a huge potential in astrophysics, particle physics and cosmology. CTA is an international initiative to build the next generation instrument, with a factor of 5-10 improvement in sensitivity in the 100 GeV-10 TeV range and the extension to energies well below 100 GeV and above 100 TeV. CTA will consist of two arrays (one in the north, one in the south) for full sky coverage and will be operated as open observatory. The design of CTA is based on currently available technology. This document reports on the status and presents the major design concepts of CTA.

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    Abstract [en]

    The ANTARES Neutrino Telescope was completed in May 2008 and is the first operational Neutrino Telescope in the Mediterranean Sea. The main purpose of the detector is to perform neutrino astronomy and the apparatus also offers facilities for marine and Earth sciences. This paper describes the design, the construction and the installation of the telescope in the deep sea, offshore from Toulon in France. An illustration of the detector performance is given. (C) 2011 Elsevier B.V. All rights reserved.

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    Salomon, K.
    Sapienza, P.
    Schmitt, F.
    Schuller, J. -P
    Shanidze, R.
    Sokalski, I.
    Spona, T.
    Spurio, M.
    van der Steenhoven, G.
    Stolarczyk, T.
    Streeb, K.
    Sulak, L.
    Taiuti, M.
    Tamburini, C.
    Tao, C.
    Tasca, L.
    Terreni, G.
    Urbano, F.
    Valdy, P.
    Valente, V.
    Vallage, B.
    Vaudaine, G.
    Venekamp, G.
    Verlaat, B.
    Vernin, P.
    van Wijk, R.
    Wijnker, G.
    Wobbe, G.
    de Wolf, E.
    Yao, A. -F
    Zaborov, D.
    Zaccone, H.
    Zornoza, J. D.
    Zuniga, J.
    Studies of a full-scale mechanical prototype line for the ANTARES neutrino telescope and tests of a prototype instrument for deep-sea acoustic measurements2007In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 581, no 3, p. 695-708Article in journal (Refereed)
    Abstract [en]

    full-scale mechanical prototype line was deployed to a depth of 2500 m to test the leak tightness of the electronics containers and the pressure-resistant properties of an electromechanical cable under evaluation for use in the ANTARES deep-sea neutrino telescope. During a month-long immersion study, line parameter data were taken using miniature autonomous data loggers and shore-based optical time domain reflectometry. Details of the mechanical prototype line, the electromechanical cable and data acquisition are presented. Data taken during the immersion study revealed deficiencies in the pressure resistance of the electromechanical cable terminations at the entry points to the electronics containers. The improvements to the termination, which have been integrated into subsequent detection lines, are discussed. The line also allowed deep-sea acoustic measurements with a prototype hydrophone system. The technical setup of this system is described, and the first results of the data analysis are presented. (c) 2007 Elsevier B.V. All rights reserved.

  • 112. Ageron, M.
    et al.
    Aguilar, J. A.
    Albert, A.
    Ameli, F.
    Anghinolfi, M.
    Anton, G.
    Anvar, S.
    Ardellier-Desages, F.
    Aslanides, E.
    Aubert, J-J
    Auer, R.
    Barbarito, E.
    Basa, S.
    Battaglieri, M.
    Becherini, Yvonne
    Università e Sezione INFN, Italy.
    Beltramelli, J.
    Bertin, V.
    Bigi, A.
    Billault, M.
    Blaes, R.
    de Botton, N.
    Bouwhuis, M. C.
    Bradbury, S. M.
    Bruijn, R.
    Brunner, J.
    Burgio, G. F.
    Busto, J.
    Cafagna, F.
    Caillat, L.
    Calzas, A.
    Capone, A.
    Caponetto, L.
    Carmona, E.
    Carr, J.
    Cartwright, S. L.
    Castel, D.
    Castorina, E.
    Cavasinni, V.
    Cecchini, S.
    Ceres, A.
    Charvis, P.
    Chauchot, P.
    Chiarusi, T.
    Circella, M.
    Colnard, C.
    Compere, C.
    Coniglione, R.
    Cottini, N.
    Coyle, P.
    Cuneo, S.
    Cussatlegras, A-S
    Damy, G.
    van Dantzig, R.
    De Bonis, G.
    De Marzo, C.
    De Vita, R.
    Dekeyser, I.
    Delagnes, E.
    Denans, D.
    Deschamps, A.
    Destelle, J-J
    Dinkespieler, B.
    Distefano, C.
    Donzaud, C.
    Drogou, J-F
    Druillole, F.
    Durand, D.
    Ernenwein, J-P
    Escoffier, S.
    Falchini, E.
    Favard, S.
    Fehr, F.
    Feinstein, F.
    Ferry, S.
    Fiorello, C.
    Flaminio, V.
    Fratini, K.
    Fuda, J-L
    Galeotti, S.
    Gallone, J-M
    Giacomelli, G.
    Girard, N.
    Gojak, C.
    Goret, Ph.
    Graf, K.
    Hallewell, G.
    Harakeh, M. N.
    Hartmann, B.
    Heijboer, A.
    Heine, E.
    Hello, Y.
    Hernandez-Rey, J. J.
    Hoessl, J.
    Hoffman, C.
    Hogenbirk, J.
    Hubbard, J. R.
    Jaquet, M.
    Jaspers, M.
    de Jong, M.
    Jouvenot, F.
    Kalantar-Nayestanaki, N.
    Kappes, A.
    Karg, T.
    Katz, U.
    Keller, P.
    Kok, E.
    Kok, H.
    Kooijman, P.
    Kopper, C.
    Korolkova, E. V.
    Kouchner, A.
    Kretschmer, W.
    Kruijer, A.
    Kuch, S.
    Kudryavstev, V. A.
    Lagier, P.
    Lahmann, R.
    Lamanna, G.
    Lamare, P.
    Lambard, G.
    Languillat, J-C
    Laschinsky, H.
    Lavalle, J.
    Le Guen, Y.
    Le Provost, H.
    Van Suu, A. Le
    Lefevre, D.
    Legou, T.
    Lelaizant, G.
    Lim, G.
    Lo Presti, D.
    Loehner, H.
    Loucatos, S.
    Louis, F.
    Lucarelli, F.
    Lyashuk, V.
    Marcelin, M.
    Margiotta, A.
    Masullo, R.
    Mazeas, F.
    Mazure, A.
    McMillan, J. E.
    Megna, R.
    Melissas, M.
    Migneco, E.
    Milovanovic, A.
    Mongelli, M.
    Montaruli, T.
    Morganti, M.
    Moscoso, L.
    Musumeci, M.
    Naumann-Godo, M.
    Naumann, C.
    Niess, V.
    Noble, T.
    Olivetto, C.
    Ostasch, R.
    Palanque-Delabrouille, N.
    Payre, P.
    Peek, H.
    Perez, A.
    Petta, C.
    Piattelli, P.
    Pillet, R.
    Pineau, J-P
    Poinsignon, J.
    Popa, V.
    Pradier, T.
    Racca, C.
    Randazzo, N.
    van Randwijk, J.
    Real, D.
    van Rens, B.
    Rethore, F.
    Rewiersma, P.
    Riccobene, G.
    Rigaud, V.
    Ripani, M.
    Roca, V.
    Roda, C.
    Rolin, J. F.
    Rose, H. J.
    Rostovtsev, A.
    Roux, J.
    Ruppi, M.
    Russo, G. V.
    Rusydi, G.
    Salesa, F.
    Salomon, K.
    Sapienza, P.
    Schmitt, F.
    Schuller, J-P
    Shanidze, R.
    Sokalski, I.
    Spona, T.
    Spurio, M.
    van der Steenhoven, G.
    Stolarczyk, T.
    Streeb, K.
    Sulak, L.
    Taiuti, M.
    Tamburini, C.
    Tao, C.
    Terreni, G.
    Thompson, L. F.
    Urbano, F.
    Valdy, P.
    Valente, V.
    Vallage, B.
    Vaudaine, G.
    Venekamp, G.
    Verlaat, B.
    Vernin, P.
    de Vries-Uiterweerd, G.
    van Wijk, R.
    Wijnker, G.
    Huberts, P. de Witt
    Wobbe, G.
    de Wolf, E.
    Yao, A-F
    Zaborov, D.
    Zaccone, H.
    Zornoza, J. D.
    Zuniga, J.
    The ANTARES optical beacon system2007In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 578, no 3, p. 498-509Article in journal (Refereed)
    Abstract [en]

    ANTARES is a neutrino telescope being deployed in the Mediterranean Sea. It consists of a three-dimensional array of photomultiplier tubes that can detect the Cherenkov light induced by charged particles produced in the interactions of neutrinos with the surrounding medium. High angular resolution can be achieved, in particular, when a muon is produced, provided that the Cherenkov photons are detected with sufficient timing precision. Considerations of the intrinsic time uncertainties stemming from the transit time spread in the photomultiplier tubes and the mechanism of transmission of light in sea water lead to the conclusion that a relative time accuracy of the order of 0.5 ns is desirable. Accordingly, different time calibration systems have been developed for the ANTARES telescope. In this article, a system based on Optical Beacons, a set of external and well-controlled pulsed light sources located throughout the detector, is described. This calibration system takes into account the optical properties of sea water, which is used as the detection volume of the ANTARES telescope. The design, tests, construction and first results of the two types of beacons, LED and laser-based, are presented. (C) 2007 Elsevier B.V. All rights reserved.

  • 113. Ageron, M.
    et al.
    Aguilar, J. A.
    Albert, A.
    Ameli, F.
    Anghinolfi, M.
    Anton, G.
    Anvar, S.
    Ardid, M.
    Aubert, J. -J
    Aublin, J.
    Auer, R.
    Basa, S.
    Bazzotti, M.
    Becherini, Yvonne
    l'Univers - Service de Physique des Particules.
    Bertin, V.
    Biagi, S.
    Bigi, A.
    Bigongiari, C.
    Bou-Cabo, M.
    Bouwhuis, M. C.
    Bruijn, R.
    Brunner, J.
    Burgio, G. F.
    Busto, J.
    Camarena, F.
    Capone, A.
    Carminati, G.
    Carr, J.
    Castel, D.
    Castorina, E.
    Cavasinni, V.
    Cecchini, S.
    Charvis, Ph.
    Chiarusi, T.
    Circella, M.
    Colnard, C.
    Coniglione, R.
    Costantini, H.
    Cottini, N.
    Coyle, P.
    De Bonis, G.
    Decowski, P.
    Dekeyser, I.
    Deschamps, A.
    Donzaud, C.
    Dornic, D.
    Drouhin, D.
    Druillole, F.
    Eberl, T.
    Ernenwein, J. -P
    Escoffier, S.
    Falchini, E.
    Fehr, F.
    Flaminio, V.
    Fratini, K.
    Fuda, J. -L
    Giacomelli, G.
    Graf, K.
    Guillard, G.
    Hallewell, G.
    Hello, Y.
    Hernandez-Rey, J. J.
    Hossl, J.
    de Jong, M.
    Kalantar-Nayestanaki, N.
    Kalekin, O.
    Kappes, A.
    Katz, U.
    Kooijman, P.
    Kopper, C.
    Kouchner, A.
    Kretschmer, W.
    Kuch, S.
    Lahmann, R.
    Lamare, P.
    Lambard, G.
    Laschinsky, H.
    Lavalle, J.
    Le Provost, H.
    Lefevre, D.
    Lelaizant, G.
    Lim, G.
    Lo Presti, D.
    Loehner, H.
    Loucatos, S.
    Louis, F.
    Lucarelli, F.
    Lyons, K.
    Mangano, S.
    Marcelin, M.
    Margiotta, A.
    Martinez-Mora, J. A.
    Maurin, G.
    Mazure, A.
    Melissas, M.
    Migneco, E.
    Montaruli, T.
    Morganti, M.
    Moscoso, L.
    Motz, H.
    Naumann, C.
    Ostasch, R.
    Pavalas, G. E.
    Payre, P.
    Petrovic, J.
    Petta, C.
    Piattelli, P.
    Picq, C.
    Pillet, R.
    Popa, V.
    Pradier, T.
    Presani, E.
    Racca, C.
    Radu, A.
    Reed, C.
    Richardt, C.
    Rujoiu, M.
    Ruppi, M.
    Russo, G. V.
    Salesa, F.
    Sapienza, P.
    Schoeck, F.
    Schuller, J. -P
    Shanidze, R.
    Simeone, F.
    Spurio, M.
    van der Steenhoven, G.
    Tamburini, C.
    Tasca, L.
    Toscano, S.
    Vecchi, M.
    Vernin, P.
    Wijnker, G.
    de Wolf, E.
    Zaborov, D.
    Zornoza, J. D.
    Zuniga, J.
    Performance of the first ANTARES detector line2009In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 31, no 4, p. 277-283Article in journal (Refereed)
    Abstract [en]

    In this paper we report on the data recorded with the first Antares detector line. The line was deployed on the 14th of February 2006 and was connected to the readout 2 weeks later. Environmental data for one and a half years of running are shown. Measurements of atmospheric muons from data taken from selected runs during the first 6 months of operation are presented. Performance figures in terms of time residuals and angular resolution are given. Finally the angular distribution of atmospheric muons is presented and from this the depth profile of the muon intensity is derived. (C) 2009 Elsevier B.V. All rights reserved.

  • 114. Aglietta, M
    et al.
    Alessandro, B
    Antonioli, P
    Arneodo, F
    Bergamasco, L
    Bertaina, M
    Castagnoli, C
    Castellina, A
    Chiavassa, A
    Cini, G
    Piazzoli, B D
    Di Sciascio, G
    Fulgione, W
    Galeotti, P
    Ghia, P L
    Iacovacci, M
    Mannocchi, G
    Morello, C
    Navarra, G
    Saavedra, O
    Stamerra, A
    Trinchero, G C
    Valchierotti, S
    Vallania, P
    Vernetto, S
    Vigorito, C
    Ambrosio, M
    Antolini, R
    Baldini, A
    Barbarino, G C
    Barish, B C
    Battistoni, G
    Becherini, Yvonne
    Università di Bologna, Italy ; INFN, Italy.
    Bellotti, R
    Bemporad, C
    Bernardini, P
    Bilokon, H
    Bower, C
    Brigida, M
    Bussino, S
    Cafagna, F
    Calicchio, M
    Campana, D
    Carboni, M
    Caruso, R
    Cecchini, S
    Cei, F
    Chiarella, V
    Chiarusi, T
    Choudhary, B C
    Coutu, S
    Cozzi, M
    De Cataldo, G
    Dekhissi, H
    De Marzo, C
    De Mitri, I
    Derkaoui, J
    De Vincenzi, M
    Di Credico, A
    Erriquez, O
    Favuzzi, C
    Forti, C
    Fusco, P
    Giacomelli, G
    Giannini, G
    Giglietto, N
    Giorgini, M
    Grassi, M
    Grillo, A
    Guarino, F
    Gustavino, C
    Habig, A
    Hanson, K
    Heinz, R
    Iarocci, E
    Katsavounidis, E
    Katsavounidis, I
    Kearns, E
    Kim, H
    Kyriazopoulou, S
    Lamanna, E
    Lane, C
    Levin, D S
    Lipari, P
    Longley, N P
    Longo, M J
    Loparco, F
    Maaroufi, F
    Mancarella, G
    Mandrioli, G
    Margiotta, A
    Marini, A
    Martello, D
    Marzari-Chiesa, A
    Mazziotta, M N
    Michael, D G
    Monacelli, P
    Montaruli, T
    Monteno, M
    Mufson, S
    Musser, J
    Nicolo, D
    Nolty, R
    Orth, C
    Osteria, G
    Palamara, O
    Patera, V
    Patrizii, L
    Pazzi, R
    Peck, C W
    Perrone, L
    Petrera, S
    Popa, V
    Raino, A
    Reynoldson, J
    Ronga, F
    Satriano, C
    Scapparone, E
    Scholberg, K
    Sciubba, A
    Sioli, M
    Sirri, G
    Sitta, M
    Spinelli, P
    Spinetti, M
    Spurio, M
    Steinberg, R
    Stone, J L
    Sulak, L R
    Surdo, A
    Tarle, G
    Togo, V
    Vakili, M
    Walter, C W
    Webb, R
    The cosmic ray proton, helium and CNO fluxes in the 100 TeV energy region from TeV muons and EAS atmospheric Cherenkov light observations of MACRO and EAS-TOP2004In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 21, no 3, p. 223-240Article in journal (Refereed)
    Abstract [en]

    The primary cosmic ray (CR) proton, helium and CNO fluxes in the energy range 80-300 TeV are studied at the National Gran Sasso Laboratories by means of EAS-TOP (Campo Imperatore, 2005 m a.s.l.) and MACRO (deep underground, 3100 m w.e., the surface energy threshold for a muon reaching the detector being E-mu(th) approximate to 1.3 TeV). The measurement is based on: (a) the selection of primaries based on their energy/nucleon (i.e., with energy/nucleon sufficient to produce a muon with energy larger than 1.3 TeV) and the reconstruction of the shower geometry by means of the muons recorded by MACRO in the deep underground laboratories; (b) the detection of the associated atmospheric Cherenkov light (C.l.) signals by means of the C.l. detector of EAS-TOP. The C.l. density at core distance r > 100 m is directly related to the total primary energy E-0. Proton and helium ("p + He") and proton, helium and CNO ("p + He + CNO") primaries are thus selected at E-0 approximate to 80 TeV, and at E-0 similar or equal to 250 TeV, respectively. Their flux is measured: J(p+He)(80 TeV) = (1.8 +/- 0.4) x 10(-6) m(-1)-s(-1) sr(-1) TeV-1, and J(p+He+CNO)(250 TeV) = (1.1 +/- 0.3) x 10(-7) m(-2)-s(-1) sr(-1) TeV-1, their relative weights being J(p+He)(J(p+He+CNO)) over bar (250 TeV) = 0.78 +/- 0.17. By using the measurements of the proton spectrum obtained from the direct experiments and hadron flux data in the atmosphere, we obtain for the relative weights of the three components at 250 TeV: J(p) : J(He) : J(CNO) = (0.20 +/- 0.08) : (0.58 +/- 0.19) : (0.22 +/- 0.17). This corresponds to the dominance of helium over proton primaries at 100-1000 TeV, and a possible non-negligible contribution from CNO. The lateral distribution of Cherenkov light in Extensive Air Showers (EASs), which is related to the rate of energy deposit of the primary in the atmosphere, is measured for a selected proton and helium primary beam, and good agreement is found when compared with the one calculated with the CORSIKA/QGSJET simulation model. (C) 2004 Elsevier B.V. All rights reserved.

  • 115. Aglietta, M
    et al.
    Alessandro, B
    Antonioli, P
    Arneodo, F
    Bergamasco, L
    Bertaina, M
    Castagnoli, C
    Castellina, A
    Chiavassa, A
    Cini, G
    Piazzoli, B D
    Di Sicascio, G
    Fulgione, W
    Galeotti, P
    Ghia, P L
    Iacovacci, M
    Mannocchi, G
    Morello, C
    Navarra, G
    Saavedra, O
    Stamerra, A
    Trinchero, G C
    Valchierotti, S
    Vallania, P
    Vernetto, S
    Vigorito, C
    Ambrosio, M
    Antolini, R
    Baldini, A
    Barbarino, G C
    Barish, B C
    Battistoni, G
    Becherini, Yvonne
    Università di Bologna, Italy ; INFN, Italy.
    Bellotti, R
    Bemporad, C
    Bernardini, P
    Bilokon, H
    Bower, C
    Brigida, M
    Bussino, S
    Cafagna, F
    Calicchio, M
    Campana, D
    Carboni, M
    Caruso, R
    Cecchini, S
    Cei, F
    Chiarella, V
    Choudhary, B C
    Coutu, S
    Cozzi, M
    De Cataldo, G
    Dekhissi, H
    De Marzo, C
    De Mitri, I
    Derkaoui, J
    De Vincenzi, M
    Di Credico, A
    Erriquez, O
    Favuzzi, C
    Forti, C
    Fusco, P
    Giacomelli, G
    Giannini, G
    Giglietto, N
    Giorgini, M
    Grassi, M
    Grillo, A
    Guarino, F
    Gustavino, C
    Habig, A
    Hanson, K
    Heinz, R
    Iarocci, E
    Katsavounidis, E
    Katsavounidis, I
    Kearns, E
    Kim, H
    Kyriazopoulou, S
    Lamanna, E
    Lane, C
    Levin, D S
    Lipari, P
    Longley, N P
    Longo, M J
    Loparco, F
    Maaroufi, F
    Mancarella, G
    Mandrioli, G
    Margiotta, A
    Marini, A
    Martello, D
    Marzari-Chiesa, A
    Mazziotta, M N
    Michael, D G
    Monacelli, P
    Montaruli, T
    Monteno, M
    Mufson, S
    Musser, J
    Nicolo, D
    Nolty, R
    Orth, C
    Osteria, G
    Palamara, O
    Patera, V
    Patrizii, L
    Pazzi, R
    Peck, C W
    Perrone, L
    Petrera, S
    Popa, V
    Raino, A
    Reynoldson, J
    Ronga, F
    Satriano, C
    Scapparone, E
    Scholberg, K
    Sciubba, A
    Serra, P
    Sioli, M
    Sirri, G
    Sitta, M
    Spinelli, P
    Spinetti, M
    Spurio, M
    Steinberg, R
    Stone, J L
    Sulak, L R
    Surdo, A
    Tarle, G
    Togo, V
    Vakili, M
    Walter, C W
    Webb, R
    The cosmic ray primary composition between 10(15) and 10(16) eV from Extensive Air Showers electromagnetic and TeV muon data2004In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 20, no 6, p. 641-652Article in journal (Refereed)
    Abstract [en]

    The cosmic ray primary composition in the energy range between 10(15) and 10(16) eV, i.e., around the "knee" of the primary spectrum, has been studied through the combined measurements of the EAS-TOP air shower array (2005 m a. s.l., 10(5) m(2) collecting area) and the MACRO underground detector (963 m.a.s.l., 3100 m w.e. of minimum rock overburden, 920 m(2) effective area) at the National Gran Sasso Laboratories. The used observables are the air shower size (N-c) measured by EAS-TOP and the muon number (N-mu) recorded by MACRO. The two detectors are separated on average by 1200 m of rock, and located at a respective zenith angle of about 30degrees. The energy threshold at the surface for muons reaching the MACRO depth is approximately 1.3 TeV. Such muons are produced in the early stages of the shower development and in a kinematic region quite different from the one relevant for the usual N-mu - N-e studies. The measurement leads to a primary composition becoming heavier at the knee of the primary spectrum, the knee itself resulting from the steepening of the spectrum of a primary light component (p, He) of Deltay = 0.7 +/- 0.4 at E-0 similar to 4 x 10(15) eV. The result confirms the ones reported from the observation of the low energy muons at the surface (typically in the GeV energy range), showing that the conclusions do not depend on the production region kinematics. Thus, the hadronic interaction model used (CORSIKA/QGSJET) provides consistent composition results from data related to secondaries produced in a rapidity region exceeding the central one. Such an evolution of the composition in the knee region supports the "standard" galactic acceleration/propagation models that imply rigidity dependent breaks of the different components.. and therefore breaks occurring at lower energies in the spectra of the light nuclei. (C) 2003 Elsevier B.V. All rights reserved.

  • 116. Aguilar, J A
    et al.
    Albert, A
    Ameli, F
    Amram, P
    Anghinolfi, M
    Anton, G
    Anvar, S
    Ardellier-Desages, F E
    Aslanides, E
    Aubert, J J
    Bailey, D
    Basa, S
    Battaglieri, M
    Becherini, Yvonne
    Università e Sezione INFN, Italy.
    Bellotti, R
    Beltramelli, J
    Bertin, V
    Billault, M
    Blaes, R
    Blanc, F
    de Botton, N
    Boulesteix, J
    Bouwhuis, M C
    Brooks, C B
    Bradbury, S M
    Bruijn, R
    Brunner, J
    Burgio, G F
    Cafagna, F
    Calzas, A
    Capone, A
    Caponetto, L
    Carmona, E
    Carr, J
    Cartwright, S L
    Castorina, E
    Cavasinni, V
    Cecchini, S
    Charvis, P
    Circella, M
    Colnard, C
    Compere, C
    Coniglione, R
    Cooper, S
    Coyle, P
    Cuneo, S
    Damy, G
    van Dantzig, R
    Deschamps, A
    De Marzo, C
    Denans, D
    Destelle, J J
    De Vita, R
    Dinkelspiler, B
    Distefano, C
    Drogou, J F
    Druillole, F
    Engelen, J
    Ernenwein, J P
    Falchini, E
    Favard, S
    Feinstein, F
    Ferry, S
    Festy, D
    Flaminio, V
    Fopma, J
    Fuda, J L
    Gallone, J M
    Giacomelli, G
    Girard, N
    Goret, P
    Graf, K
    Hallewell, G
    Hartmann, B
    Heijboer, A
    Hello, Y
    Hernandez-Rey, J J
    Herrouin, G
    Hossl, J
    Hoffmann, C
    Hubbard, J R
    Jaquet, M
    de Jong, M
    Jouvenot, F
    Kappes, A
    Karg, T
    Karkar, S
    Karolak, M
    Katz, U
    Keller, P
    Kooijman, P
    Korolkova, E V
    Kouchner, A
    Kretschmer, W
    Kuch, S
    Kudryavtsev, V A
    Lafoux, H
    Lagier, P
    Lahmann, R
    Lamare, P
    Languillat, J C
    Laschinsky, H
    Laubier, L
    Legou, T
    Le Guen, Y
    Le Provost, H
    Van Suu, A L
    Lo Nigro, L
    Lo Presti, D
    Loucatos, S
    Louis, F
    Lyashuk, V
    Marcelin, M
    Margiotta, A
    Maron, C
    Massol, A
    Masullo, R
    Mazeas, F
    Mazure, A
    McMillan, J E
    Migneco, E
    Millot, C
    Milovanovic, A
    Montanet, F
    Montaruli, T
    Morel, J P
    Morganti, M
    Moscoso, L
    Musumeci, M
    Naumann, C
    Naumann-Godo, M
    Nezri, E
    Niess, V
    Nooren, G J
    Ogden, P
    Olivetto, C
    Palanque-Delabrouille, N
    Papaleo, R
    Payre, P
    Petta, C
    Piattelli, P
    Pineau, J P
    Poinsignon, J
    Popa, V
    Potheau, R
    Pradier, T
    Racca, C
    Raia, G
    Randazzo, N
    Real, D
    van Rens, B A P
    Rethore, F
    Riccobene, G
    Rigaud, V
    Ripani, M
    Roca-Blay, V
    Rolin, J F
    Romita, M
    Rose, H J
    Rostovtsev, A
    Ruppi, M
    Russo, G V
    Sacquin, Y
    Salesa, F
    Salomon, K
    Saouter, S
    Sapienza, P
    Shanidze, R
    Schuller, J P
    Schuster, W
    Sokalski, I
    Spurio, M
    Stolarczyk, T
    Stubert, D
    Taiuti, M
    Thompson, L F
    Tilav, S
    Valdy, P
    Valente, V
    Vallage, B
    Vernin, P
    Virieux, J
    de Vries, G
    Huberts, P D
    de Wolf, E
    Zaborov, D
    Zaccone, H
    Zakharov, V
    Zornoza, J D
    Zuniga, J
    Study of large hemispherical photomultiplier tubes for the ANTARES neutrino telescope2005In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 555, no 1-2, p. 132-141Article in journal (Refereed)
    Abstract [en]

    The ANTARES neutrino telescope, to be immersed depth in the Mediterranean Sea, will consist of a three-dimensional matrix of 900 large area photomultiplier tubes housed in pressure-resistant glass spheres. The selection of the optimal photomultiplier was a critical step for the project and required an intensive phase of tests and developments carried out in close collaboration with the main manufacturers worldwide. This paper provides an overview of the tests performed by the collaboration and describes in detail the features of the photomultiplier tube chosen for ANTARES. (c) 2005 Elsevier B.V. All rights reserved.

  • 117. Aguilar, J. A.
    et al.
    Albert, A.
    Ameli, F.
    Anghinolfi, M.
    Anton, G.
    Anvar, S.
    Aslanides, E.
    Aubert, J. -J
    Barbarito, E.
    Basa, S.
    Battaglieri, M.
    Becherini, Yvonne
    Università e Sezione INFN, Italy.
    Bellotti, R.
    Beltramelli, J.
    Bertin, V.
    Bigi, A.
    Billault, M.
    Blaes, R.
    de Botton, N.
    Bouwhuis, M. C.
    Bradbury, S. M.
    Bruijn, R.
    Brunner, J.
    Burgio, G. F.
    Busto, J.
    Cafagna, F.
    Caillat, L.
    Calzas, A.
    Capone, A.
    Caponetto, L.
    Carmona, E.
    Carr, J.
    Cartwright, S. L.
    Castel, D.
    Castorina, E.
    Cavasinni, V.
    Cecchini, S.
    Ceres, A.
    Charvis, P.
    Chauchot, P.
    Chiarusi, T.
    Circella, M.
    Colnard, C.
    Compere, C.
    Coniglione, R.
    Cottini, N.
    Coyle, P.
    Cuneo, S.
    Cussatlegras, A. -S
    Damy, G.
    van Dantzig, R.
    De Marzo, C.
    Dekeyser, I.
    Delagnes, E.
    Denans, D.
    Deschamps, A.
    Dessages-Ardellier, F.
    Destelle, J. -J
    Dinkespieler, B.
    Distefano, C.
    Donzaud, C.
    Drogou, J. -F
    Druillole, F.
    Durand, D.
    Ernenwein, J. -P
    Escoffier, S.
    Falchini, E.
    Favard, S.
    Feinstein, F.
    Ferry, S.
    Festy, D.
    Fiorello, C.
    Flaminio, V.
    Galeotti, S.
    Gallone, J. -M
    Giacomelli, G.
    Girard, N.
    Gojak, C.
    Goret, Ph.
    Graf, K.
    Hallewell, G.
    Harakeh, M. N.
    Hartmann, B.
    Heijboer, A.
    Heine, E.
    Hello, Y.
    Hernandez-Rey, J. J.
    Hoessl, J.
    Hoffman, C.
    Hogenbirk, J.
    Hubbard, J. R.
    Jaquet, M.
    Jaspers, M.
    de Jong, M.
    Jouvenot, F.
    Kalantar-Nayestanaki, N.
    Kappes, A.
    Karg, T.
    Karkar, S.
    Katz, U.
    Keller, P.
    Kok, H.
    Kooijman, P.
    Kopper, C.
    Korolkova, E. V.
    Kouchner, A.
    Kretschmer, W.
    Kruijer, A.
    Kuch, S.
    Kudryavstev, V. A.
    Lachartre, D.
    Lafoux, H.
    Lagier, P.
    Lahmann, R.
    Lamanna, G.
    Lamare, P.
    Languillat, J. C.
    Laschinsky, H.
    Le Guen, Y.
    Le Provost, H.
    Suu, A. Le Van
    Legou, T.
    Lim, G.
    Lo Nigro, L.
    Lo Presti, D.
    Loehner, H.
    Loucatos, S.
    Louis, F.
    Lucarelli, F.
    Lyashuk, V.
    Marcelin, M.
    Margiotta, A.
    Masullo, R.
    Mazeas, F.
    Mazure, A.
    McMillan, J. E.
    Megna, R.
    Melissas, M.
    Migneco, E.
    Milovanovic, A.
    Mongelli, M.
    Montaruli, T.
    Morganti, M.
    Moscoso, L.
    Musumeci, M.
    Naumann, C.
    Naumann-Godo, M.
    Niess, V.
    Olivetto, C.
    Ostasch, R.
    Palanque-Delabrouille, N.
    Payre, P.
    Peek, H.
    Petta, C.
    Piattelli, P.
    Pineau, J. -P
    Poinsignon, J.
    Popa, V.
    Pradier, T.
    Racca, C.
    Randazzo, N.
    van Randwijk, J.
    Real, D.
    van Rens, B.
    Rethore, F.
    Rewiersma, P.
    Riccobene, G.
    Rigaud, V.
    Ripani, M.
    Roca, V.
    Roda, C.
    Rolin, J. F.
    Romita, M.
    Rose, H. J.
    Rostovtsev, A.
    Roux, J.
    Ruppi, M.
    Russo, G. V.
    Salesa, F.
    Salomon, K.
    Sapienza, P.
    Schmitt, F.
    Schuller, J. -P
    Shanidze, R.
    Sokalski, I.
    Spona, T.
    Spurio, M.
    van der Steenhoven, G.
    Stolarczyk, T.
    Streeb, K.
    Stubert, D.
    Sulak, L.
    Taiuti, M.
    Tamburini, C.
    Tao, C.
    Terreni, G.
    Thompson, L. F.
    Valdy, P.
    Valente, V.
    Vallage, B.
    Venekamp, G.
    Verlaat, B.
    Vernin, P.
    de Vita, R.
    de Vries, G.
    van Wijk, R.
    Huberts, P. de Witt
    Wobbe, G.
    de Wolf, E.
    Yao, A-F
    Zaborov, D.
    Zaccone, H.
    Zornoza, J. D.
    Zuniga, J.
    The data acquisition system for the ANTARES neutrino telescope2007In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 570, no 1, p. 107-116Article in journal (Refereed)
    Abstract [en]

    The ANTARES neutrino telescope is being constructed in the Mediterranean Sea. It consists of a large three-dimensional array of photo-multiplier tubes. The data acquisition system of the detector takes care of the digitisation of the photo-multiplier tube signals, data transport, data filtering, and data storage. The detector is operated using a control program interfaced with all elements. The design and the implementation of the data acquisition system are described. (c) 2006 Elsevier B.V. All rights reserved.

  • 118. Aguilar, J. A.
    et al.
    Albert, A.
    Ameli, F.
    Anghinolfi, M.
    Anton, G.
    Anvar, S.
    Aslanides, E.
    Aubert, J. -J
    Barbarito, E.
    Basa, S.
    Battaglieri, M.
    Becherini, Yvonne
    Università e Sezione INFN, Italy.
    Bellotti, R.
    Beltramelli, J.
    Bertin, V.
    Bigi, A.
    Billault, M.
    Blaes, R.
    de Botton, N.
    Bouwhuis, M. C.
    Bradbury, S. M.
    Bruijn, R.
    Brunner, J.
    Burgio, G. F.
    Busto, J.
    Cafagna, F.
    Caillat, L.
    Calzas, A.
    Capone, A.
    Caponetto, L.
    Carmona, E.
    Carr, J.
    Cartwright, S. L.
    Castel, D.
    Castorina, E.
    Cavasinni, V.
    Cecchini, S.
    Ceres, A.
    Charvis, P.
    Chauchot, P.
    Chiarusi, T.
    Circella, M.
    Colnard, C.
    Compere, C.
    Coniglione, R.
    Cottini, N.
    Coyle, P.
    Cuneo, S.
    Cussatlegras, A. -S
    Damy, G.
    van Dantzig, R.
    De Marzo, C.
    Dekeyser, I.
    Delagnes, E.
    Denans, D.
    Deschamps, A.
    Dessages-Ardellier, F.
    Destelle, J. -J
    Dinkespieler, B.
    Distefano, C.
    Donzaud, C.
    Drogou, J. -F
    Druillole, F.
    Durand, D.
    Ernenwein, J. -P
    Escoffier, S.
    Falchini, E.
    Favard, S.
    Feinstein, F.
    Ferry, S.
    Festy, D.
    Fiorello, C.
    Flaminio, V.
    Galeotti, S.
    Gallone, J. -M
    Giacomelli, G.
    Girard, N.
    Gojak, C.
    Goret, Ph.
    Graf, K.
    Hallewell, G.
    Harakeh, M. N.
    Hartmann, B.
    Heijboer, A.
    Heine, E.
    Hello, Y.
    Hernandez-Rey, J. J.
    Hoessl, J.
    Hoffman, C.
    Hogenbirk, J.
    Hubbard, J. R.
    Jaquet, M.
    Jaspers, M.
    de Jong, M.
    Jouvenot, F.
    Kalantar-Nayestanaki, N.
    Kappes, A.
    Karg, T.
    Karkar, S.
    Katz, U.
    Keller, P.
    Kok, H.
    Kooijman, P.
    Kopper, C.
    Korolkova, E. V.
    Kouchner, A.
    Kretschmer, W.
    Kruijer, A.
    Kuch, S.
    Kudryavstev, V. A.
    Lachartre, D.
    Lafoux, H.
    Lagier, P.
    Lahmann, R.
    Lamanna, G.
    Lamare, P.
    Languillat, J. C.
    Laschinsky, H.
    Le Guen, Y.
    Le Provost, H.
    Van Suu, A. Le
    Legou, T.
    Lim, G.
    Lo Nigro, L.
    Lo Presti, D.
    Loehner, H.
    Loucatos, S.
    Louis, F.
    Lucarelli, F.
    Lyashuk, V.
    Marcelin, M.
    Margiotta, A.
    Masullo, R.
    Mazeas, F.
    Mazure, A.
    McMillan, J. E.
    Megna, R.
    Melissas, M.
    Migneco, E.
    Milovanovic, A.
    Mongelli, M.
    Montaruli, T.
    Morganti, M.
    Moscoso, L.
    Musumeci, M.
    Naumann, C.
    Naumann-Godo, M.
    Niess, V.
    Olivetto, C.
    Ostasch, R.
    Palanque-Delabrouille, N.
    Payre, P.
    Peek, H.
    Petta, C.
    Piattelli, P.
    Pineau, J. -P
    Poinsignon, J.
    Popa, V.
    Pradier, T.
    Racca, C.
    Randazzo, N.
    van Randwijk, J.
    Real, D.
    van Rens, B.
    Rethore, F.
    Rewiersma, P.
    Riccobene, G.
    Rigaud, V.
    Ripani, M.
    Roca, V.
    Roda, C.
    Rolin, J. F.
    Romita, M.
    Rose, H. J.
    Rostovtsev, A.
    Roux, J.
    Ruppi, M.
    Russo, G. V.
    Salesa, F.
    Salomon, K.
    Sapienza, P.
    Schmitt, F.
    Schuller, J. -P
    Shanidze, R.
    Sokalski, I.
    Spona, T.
    Spurio, M.
    van der Steenhoven, G.
    Stolarczyk, T.
    Streeb, K.
    Stubert, D.
    Sulak, L.
    Taiuti, M.
    Tamburini, C.
    Tao, C.
    Terreni, G.
    Thompson, L. F.
    Valdy, P.
    Valente, V.
    Vallage, B.
    Venekamp, G.
    Verlaat, B.
    Vernin, P.
    de Vita, R.
    de Vries, G.
    van Wijk, R.
    Huberts, P. de Witt
    Wobbe, G.
    de Wolf, E.
    Yao, A. -F
    Zaborov, D.
    Zaccone, H.
    Zornoza, J. D.
    Zuniga, J.
    First results of the instrumentation line for the deep-sea ANTARES neutrino telescope2006In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 26, no 4-5, p. 314-324Article in journal (Refereed)
    Abstract [en]

    In 2005, the ANTARES Collaboration deployed and operated at a depth of 2500 m a so-called Mini Instrumentation Line equipped with Optical Modules (MILOM) at the ANTARES site. The various data acquired during the continuous operation from April to December 2005 of the MILOM confirm the satisfactory performance of the Optical Modules, their front-end electronics and readout system. as well as the calibration devices of the detector. The in situ measurement of the Optical Module time response yields a resolution better than 0.5 ns. The performance of the acoustic positioning system, which enables the spatial reconstruction of the ANTARES detector with a precision of about 10 cm, is verified. These results demonstrate that with the full ANTARES neutrino telescope the design angular resolution of better than 0.3 degrees can be realistically achieved.

  • 119. Aguilar, J A
    et al.
    Albert, A
    Amram, P
    Anghinolfi, M
    Anton, G
    Anvar, S
    Ardellier-Desages, F E
    Aslanides, E
    Aubert, J J
    Azoulay, R
    Bailey, D
    Basa, S
    Battaglieri, M
    Becherini, Yvonne
    Università e Sezione INFN, Italy.
    Bellotti, R
    Beltramelli, J
    Bertin, V
    Billault, M
    Blaes, R
    Blanc, F
    Bland, R W
    de Botton, N
    Boulesteix, J
    Bouwhuis, M C
    Brooks, C B
    Bradbury, S M
    Bruijn, R
    Brunner, J
    Bugeon, F
    Burgio, G F
    Cafagna, F
    Calzas, A
    Caponetto, L
    Carmona, E
    Carr, J
    Cartwright, S L
    Cecchini, S
    Charvis, P
    Circella, M
    Colnard, C
    Compere, C
    Croquette, J
    Cooper, S
    Coyle, P
    Cuneo, S
    Damy, G
    van Dantzig, R
    Deschamps, A
    De Marzo, C
    Destelle, J J
    De Vita, R
    Dinkelspiler, B
    Dispau, G
    Drougou, J F
    Druillole, F
    Engelen, J
    Favard, S
    Feinstein, F
    Ferry, S
    Festy, D
    Fopma, J
    Fuda, J L
    Gallone, J M
    Giacomelli, G
    Girard, N
    Goret, P
    Gournay, J F
    Hallewell, G
    Hartmann, B
    Heijboer, A
    Hello, Y
    Hernandez-Rey, J J
    Herrouin, G
    Hossl, J
    Hoffmann, C
    Hubbard, J R
    Jaquet, M
    de Jong, M
    Jouvenot, F
    Kappes, A
    Karg, T
    Karkar, S
    Karolak, M
    Katz, U
    Keller, P
    Kooijman, P
    Korolkova, E V
    Kouchner, A
    Kretschmer, W
    Kudryavtsev, V A
    Lafoux, H
    Lagier, P
    Lamare, P
    Languillat, J C
    Laubler, L
    Legou, T
    Le Guen, Y
    Le Provost, H
    Le van Suu, A
    Lo Nigro, L
    Lo Presti, D
    Loucatos, S
    Louis, F
    Lyashuk, V
    Magnier, P
    Marcelin, M
    Margiotta, A
    Maron, C
    Massol, A
    Mazeas, F
    Mazeau, B
    Mazure, A
    McMillan, J E
    Michel, J L
    Millot, C
    Milovanovic, A
    Montanet, F
    Montaruli, T
    Morel, J P
    Moscoso, L
    Nezri, E
    Niess, V
    Nooren, G J
    Ogden, P
    Olivetto, C
    Palanque-Delabrouille, N
    Payre, P
    Petta, C
    Pineau, J P
    Poinsignon, J
    Popa, V
    Potheau, R
    Pradier, T
    Racca, C
    Randazzo, N
    Real, D
    van Rens, B A P
    Rethore, F
    Ripani, M
    Roca-Blay, V
    Romeyer, A
    Rollin, J F
    Romita, M
    Rose, H J
    Rostovtsev, A
    Ruppi, M
    Russo, G V
    Sacquin, Y
    Saouter, S
    Schuller, J P
    Schuster, W
    Sokalski, I
    Suvorova, O
    Spooner, N J C
    Spurio, M
    Stolarczyk, T
    Stubert, D
    Taiuti, M
    Thompson, L F
    Tilav, S
    Usik, A
    Valdy, P
    Vallage, B
    Vaudaine, G
    Vernin, P
    Virieux, J
    Vladimirsky, E
    de Vries, G
    Huberts, P D
    de Wolf, E
    Zaborov, D
    Zaccone, H
    Zakharov, V
    Zavatarelli, S
    de Zornoza, J D
    Zuniga, J
    Transmission of light in deep sea water at the site of the ANTARES neutrino telescope2005In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 23, no 1, p. 131-155Article in journal (Refereed)
    Abstract [en]

    The ANTARES neutrino telescope is a large photomultiplier array designed to detect neutrino-induced upward-going muons by their Cherenkov radiation. Understanding the absorption and scattering of light in the deep Mediterranean is fundamental to optimising the design and performance of the detector. This paper presents measurements of blue and UV light transmission at the ANTARES site taken between 1997 and 2000. The derived values for the scattering length and the angular distribution of particulate scattering were found to be highly correlated, and results are therefore presented in terms of an absorption length;,ab, and an effective scattering length lambda(sct)(eff). The values for blue (UV) light are found to be lambda(abs) similar or equal to 60(26) m, lambda(sct)(eff similar or equal to) 265(122) m, with significant (similar to15%) time variability. Finally, the results of ANTARES simulations showing the effect of these water properties on the anticipated performance of the detector are presented. (C) 2004 Elsevier B.V. All rights reserved.

  • 120. Aharonian, F.
    et al.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Behera, B.
    Benbow, W.
    Bernloehr, K.
    Bochow, A.
    Boisson, C.
    Bolmont, J.
    Borrel, V.
    Brucker, J.
    Brun, F.
    Brun, P.
    Buehler, R.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Gerbig, D.
    Giebels, B.
    Glicenstein, J. F.
    Glueck, B.
    Goret, P.
    Goering, D.
    Hauser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jahn, C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kendziorra, E.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, Nu.
    Kosack, K.
    Lamanna, G.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Martin, J. M.
    Martineau-Huynh, O.
    Marcowith, A.
    Masbou, J.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Nicholas, B.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J. -F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P. -O
    Pita, S.
    Puehlhofer, G.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Renaud, M.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schroeder, R.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sikora, M.
    Skilton, J. L.
    Sol, H.
    Spangler, D.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Stinzing, F.
    Superina, G.
    Szostek, A.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    Tluczykont, M.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    Discovery of VHE gamma-rays from the BL Lacertae object PKS 0548-3222010In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 521, p. A69-Article in journal (Refereed)
    Abstract [en]

    Aims. PKS 0548-322 (z = 0.069) is a "high-frequency-peaked" BL Lac object and a candidate very high energy (VHE, E > 100 GeV) gamma-ray emitter, due to its high X-ray and radio flux. Observations at the VHE band provide insights into the origin of very energetic particles present in this source and the radiation processes at work. Methods. We report observations made between October 2004 and January 2008 with the HESS array, a four imaging atmospheric-Cherenkov telescopes. Contemporaneous UV and X-ray observations with the Swift satellite in November 2006 are also reported. Results. PKS 0548-322 is detected for the first time in the VHE band with HESS We measure an excess of 216 gamma-rays corresponding to a significance of 5.6 standard deviations. The photon spectrum of the source is described by a power-law, with a photon index of Gamma = 2.86 +/- 0.34(stat) +/- 0.10(sys). The integral flux above 200 GeV is similar to 1.3% of the flux of the Crab Nebula, and is consistent with being constant in time. Contemporaneous Swift/XRT observations reveal an X-ray flux between 2 and 10 keV of F2-10 keV = (2.3 +/- 0.2) x 10(-11) erg cm(-2) s(-1), an intermediate intensity state with respect to previous observations. The spectral energy distribution can be reproduced using a simple one-zone synchrotron self Compton model, with parameters similar those observed for other sources of this type.

  • 121. Aharonian, F.
    et al.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Behera, B.
    Benbow, W.
    Bernloehr, K.
    Boisson, C.
    Bochow, A.
    Borrel, V.
    Braun, I.
    Brion, E.
    Brucker, J.
    Brun, P.
    Buehler, R.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Carrigan, S.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Dalton, M.
    Daniel, M. K.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Giebels, B.
    Glicenstein, J. F.
    Glueck, B.
    Goret, P.
    Hauser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kendziorra, E.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Komin, Nu.
    Kosack, K.
    Lamanna, G.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Martin, J. M.
    Martineau-Huynh, O.
    Marcowith, A.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J. -F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P. -O
    Pita, S.
    Puehlhofer, G.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Renaud, M.
    Reimer, O.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schroeder, R.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Skilton, J. L.
    Sol, H.
    Spangler, D.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Superina, G.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    Detection of very high energy radiation from HESS J1908+063 confirms the Milagro unidentified source MGRO J1908+062009In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 499, no 3, p. 723-728Article in journal (Refereed)
    Abstract [en]

    Aims. Detection of gamma-ray source above 300 GeV is reported, confirming the unidentified source MGRO J1908+06, discovered by the Milagro collaboration at a median energy of 20 TeV. Methods. The source was observed during 27 h as part of the extension of the HESS Galactic plane survey to longitudes > 30 degrees. Results. HESS J1908+063 is detected at a significance level of 10.9 sigma with an integral flux above 1 TeV of (3.76 +/- 0.29 (stat) +/- 0.75(sys)) x 10(-12) ph cm(-2) s(-1), and a spectral photon index Gamma = 2.10 +/- 0.07 (stat) +/- 0.2(sys). The positions and fluxes of HESS J1908+063 and MGRO J1908+06 are in good agreement. Possible counterparts at other wavelengths and the origin of the gamma-ray emission are discussed. The nearby unidentified GeV source, GRO J1908+0556 (GeV) which also remains unidentified and the new Fermi pulsar 0FGL J1907.5+0617, may be connected to the TeV source.

  • 122. Aharonian, F.
    et al.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Univ Paris 07, CNRS, UMR 7164, CEA,Observ Paris, F-75205 Paris 13, France.
    Behera, B.
    Benbow, W.
    Bernloehr, K.
    Boisson, C.
    Bochow, A.
    Borrel, V.
    Brion, E.
    Brucker, J.
    Brun, P.
    Buehler, R.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Costamante, L.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Giebels, B.
    Glicenstein, J. F.
    Glueck, B.
    Goret, P.
    Goehring, D.
    Hauser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jahn, C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kendziorra, E.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, Nu.
    Kosack, K.
    Lamanna, G.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Martin, J. M.
    Martineau-Huynh, O.
    Marcowith, A.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Moderski, R.
    Monard, L. A. G.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J. -F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P-O
    Pita, S.
    Puehlhofer, G.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Renaud, M.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schroeder, R.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sikora, M.
    Skilton, J. L.
    Sol, H.
    Spangler, D.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Superina, G.
    Szostek, A.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    Tluczykont, M.
    Van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    Simultaneous multiwavelength observations of the second exceptional gamma-ray flare of PKS2155-304 in July 20062009In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 502, no 3, p. 749-770Article, review/survey (Refereed)
    Abstract [en]

    Aims. The X-ray-TeV connection and the evolution of the emitting particle population is studied in high-energy peaked BL Lac objects, by obtaining spectral information in both bands on sub-hour timescales. Methods. Simultaneous observations with HESS, Chandra and the Bronberg optical observatory were performed on the BL Lac object PKS 2155-304 in the night of July 29-30 2006, when the source underwent a major gamma-ray outburst during its high-activity state of Summer 2006. This event took place about 44 h after the other major outburst of the night of July 27-28, which is known for its ultrafast variability. An unprecedented 6 to 8 h of simultaneous, uninterrupted coverage was achieved, with spectra and light curves measured down to 7 and 2 min timescales, respectively. Results. The source exhibited one major flare along the night, at high energies. The gamma-ray flux reached a maximum of similar to 11 times the Crab flux (>400 GeV), with rise/decay timescales of similar to 1 h, plus a few smaller-amplitude flares superimposed on the decaying phase. The emission in the X-ray and VHE gamma-ray bands is strongly correlated, with no evidence of lags. The spectra also evolve with similar patterns, and are always soft ( photon index G > 2), indicating no strong shift of the peaks in the spectral energy distribution towards higher energies. Only at the flare maximum is there evidence that the gamma-ray peak is inside the observed passband, at similar to 400-600 GeV. The VHE spectrum shows a curvature that is variable with time and stronger at higher fluxes. The huge VHE variations (similar to 22x) are only accompanied by small-amplitude X-ray and optical variations (factor 2 and 15% respectively). The source has shown for the first time in a high-energy peaked BL Lac object a large Compton dominance (L(C)/L(S) similar to 10) - rapidly evolving - and a cubic relation between VHE and X-ray flux variations, during a decaying phase. These results challenge the common scenarios for the TeV-blazar emission.

  • 123. Aharonian, F.
    et al.
    Akhperjanian, A. G.
    Anton, G.
    de Almeida, U. Barres
    Bazer-Bachi, A. R.
    Becherini, Yvonne
    Universite Paris 7 Denis Diderot.
    Behera, B.
    Benbow, W.
    Bernloehr, K.
    Boisson, C.
    Bochow, A.
    Borrel, V.
    Brion, E.
    Brucker, J.
    Brun, P.
    Buehler, R.
    Bulik, T.
    Buesching, I.
    Boutelier, T.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Chounet, L. -M
    Clapson, A. C.
    Coignet, G.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O 'C.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Feinstein, F.
    Fiasson, A.
    Foerster, A.
    Fontaine, G.
    Fuessling, M.
    Gabici, S.
    Gallant, Y. A.
    Gerard, L.
    Giebels, B.
    Glicenstein, J. -F
    Glueck, B.
    Goret, P.
    Goehring, D.
    Hauser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, S.
    Horns, D.
    Jacholkowska, A.
    de Jager, O. C.
    Jahn, C.
    Jung, I.
    Katarzynsky, K.
    Katz, U.
    Kaufmann, S.
    Kendziorra, E.
    Kerschhaggl, M.
    Khangulyan, D.
    Khelifi, B.
    Keogh, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, Nu.
    Kosack, K.
    Lamanna, G.
    Latham, I. J.
    Lenain, J. -P
    Lohse, T.
    Marandon, V.
    Martin, J. M.
    Martineau-Huynh, O.
    Marcowith, A.
    Maurin, D.
    McComb, T. J. L.
    Medina, M. C.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Niemiec, J.
    Nolan, S. J.
    Ohm, S.
    Olive, J. -F
    Wilhelmi, E. de Ona
    Orford, K. J.
    Ostrowski, M.
    Panter, M.
    Arribas, M. Paz
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P. -O
    Pita, S.
    Puehlhofer, G.
    Punch, M.
    Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
    Quirrenbach, A.
    Raubenheimer, B. C.
    Raue, M.
    Rayner, S. M.
    Renaud, M.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier-Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C. B.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schoeck, F. M.
    Schroeder, R.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sikora, M.
    Skilton, J. L.
    Sol, H.
    Spangler, D.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Superina, G.
    Szostek, A.
    Tam, P. H.
    Tavernet, J. -P
    Terrier, R.
    Tibolla, O.
    Tluczykont, M.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J. P.
    Vincent, P.
    Vink, J.
    Vivier, M.
    Voelk, H. J.
    Volpe, F.
    Wagner, S. J.
    Ward, M.
    Zdziarski, A. A.
    Zech, A.
    Discovery of very high energy γ-ray emission from centaurus a with H.E.S.S.2009In: Astrophysical Journal Letters, ISSN 2041-8205, Vol. 695, no 1, p. L40-L44Article in journal (Refereed)
    Abstract [en]

    We report the discovery of faint very high energy (VHE; E > 100 GeV) gamma-ray emission from the radio galaxy Centaurus A in observations performed with the High Energy Stereoscopic System (H.E.S.S.) experiment, an imaging atmospheric Cherenkov telescope array consisting of four telescopes located in Namibia. Centaurus A has been observed for more than 120 hr. A signal with a statistical significance of 5.0 sigma is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of similar to 250 GeV is measured to be 0.8% of the flux of the Crab Nebula (apparent luminosity: L(> 250 GeV) approximate to 2.6 x 1039 erg s(-1), adopting a distance of 3.8 Mpc). The spectrum can be described by a power law with a photon index of 2.7 +/- 0.5(stat) +/- 0.2(sys). No significant flux variability is detected in the data set. However, the low flux only allows detection of variability on the timescale of days to flux increments above a factor of similar to 15-20 (3 sigma and 4 sigma, respectively). The discovery of VHE gamma-ray emission from Centaurus A reveals particle acceleration in the source to > TeV energies and, together with M 87, establishes radio galaxies as a class of VHE emitters.

  • 124. Aharonian, F.
    et al.