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  • 51. Collaboration, V E R I T A S
    et al.
    Aliu, E.
    Arlen, T.
    Aune, T.
    Beilicke, M.
    Benbow, W.
    Bouvier, A.
    Bradbury, S. M.
    Buckley, J. H.
    Bugaev, V.
    Byrum, K.
    Cannon, A.
    Cesarini, A.
    Christiansen, J. L.
    Ciupik, L.
    Collins-Hughes, E.
    Connolly, M. P.
    Cui, W.
    Dickherber, R.
    Duke, C.
    Errando, M.
    Falcone, A.
    Finley, J. P.
    Finnegan, G.
    Fortson, L.
    Furniss, A.
    Galante, N.
    Gall, D.
    Gibbs, K.
    Gillanders, G. H.
    Godambe, S.
    Griffin, S.
    Grube, J.
    Guenette, R.
    Gyuk, G.
    Hanna, D.
    Holder, J.
    Huan, H.
    Hughes, G.
    Hui, C. M.
    Humensky, T. B.
    Imran, A.
    Kaaret, P.
    Karlsson, N.
    Kertzman, M.
    Kieda, D.
    Krawczynski, H.
    Krennrich, F.
    Lang, M. J.
    Lyutikov, M.
    Madhavan, A. S.
    Maier, G.
    Majumdar, P.
    McArthur, S.
    McCann, A.
    McCutcheon, M.
    Moriarty, P.
    Mukherjee, R.
    Nuñez, P.
    Ong, R. A.
    Orr, M.
    Otte, A. N.
    Park, N.
    Perkins, J. S.
    Pizlo, F.
    Pohl, M.
    Prokoph, Heike
    Deutsches Elektronen Synchrotron Germany.
    Quinn, J.
    Ragan, K.
    Reyes, L. C.
    Reynolds, P. T.
    Roache, E.
    Rose, H. J.
    Ruppel, J.
    Saxon, D. B.
    Schroedter, M.
    Sembroski, G. H.
    \c Sentürk, G. D.
    Smith, A. W.
    Staszak, D.
    Te\v sić, G.
    Theiling, M.
    Thibadeau, S.
    Tsurusaki, K.
    Tyler, J.
    Varlotta, A.
    Vassiliev, V. V.
    Vincent, S.
    Vivier, M.
    Wakely, S. P.
    Ward, J. E.
    Weekes, T. C.
    Weinstein, A.
    Weisgarber, T.
    Williams, D. A.
    Zitzer, B.
    Detection of Pulsed Gamma Rays Above 100 GeV from the Crab Pulsar2011In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 334, no 6052, p. 69-72Article in journal (Refereed)
    Abstract [en]

    We report the detection of pulsed gamma rays from the Crab pulsar at energies above 100 giga–electron volts (GeV) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) array of atmospheric Cherenkov telescopes. The detection cannot be explained on the basis of current pulsar models. The photon spectrum of pulsed emission between 100 mega–electron volts and 400 GeV is described by a broken power law that is statistically preferred over a power law with an exponential cutoff. It is unlikely that the observation can be explained by invoking curvature radiation as the origin of the observed gamma rays above 100 GeV. Our findings require that these gamma rays be produced more than 10 stellar radii from the neutron star.

  • 52.
    D’Ammando, F.
    et al.
    Universitá degli Studi di Bologna, Italy ; INAF – Istituto di Radioastronomia, Italy.
    Orienti, M.
    INAF – Istituto di Radioastronomia, Italy.
    Finke, J.
    U.S. Naval Research Laboratory, USA.
    Raiteri, C. M.
    INAF – Osservatorio Astrofisico di Torino, Italy.
    Hovatta, T.
    California Institute of Technology, USA.
    Larsson, J.
    Royal Institute of Technology, Sweden.
    Max-Moerbeck, W.
    National Radio Astronomy Observatory (NRAO), USA.
    Perkins, J.
    NASA Goddard Space Flight Center, USA.
    Readhead, A. C. S.
    California Institute of Technology, USA.
    Richards, J. L.
    Purdue University, USA.
    Beilicke, M.
    Washington University, USA.
    Benbow, W.
    Harvard-Smithsonian Center for Astrophysics, USA.
    Berger, K.
    University of Delaware, USA.
    Bird, R.
    University College Dublin, Ireland.
    Bugaev, V.
    Washington University, USA.
    Cardenzana, J. V.
    Iowa State University, USA.
    Cerruti, M.
    Harvard-Smithsonian Center for Astrophysics, USA.
    Chen, X.
    University of Potsdam, Germany ; DESY, Germany .
    Ciupik, L.
    Adler Planetarium and Astronomy Museum, USA.
    Dickinson, H. J.
    Iowa State University, USA.
    Eisch, J. D.
    Iowa State University, USA.
    Errando, M.
    Columbia University, USA.
    Falcone, A.
    Pennsylvania State University, USA .
    Finley, J. P.
    Purdue University, USA.
    Fleischhack, H.
    DESY, Germany.
    Fortin, P.
    Harvard-Smithsonian Center for Astrophysics, USA.
    Fortson, L.
    University of Minnesota, USA.
    Furniss, A.
    University of California, USA.
    Gerard, L.
    DESY, Germany.
    Gillanders, G. H.
    National University of Ireland Galway, Ireland.
    Griffiths, S. T.
    University of Iowa, USA.
    Grube, J.
    Adler Planetarium and Astronomy Museum, USA.
    Gyuk, G.
    Adler Planetarium and Astronomy Museum, USA.
    Håkansson, N.
    University of Potsdam, Germany.
    Holder, J.
    University of Delaware, USA.
    Humensky, T. B.
    Columbia University, USA.
    Kar, P.
    University of Utah, USA.
    Kertzman, M.
    DePauw University, USA.
    Khassen, Y.
    University College Dublin, Ireland.
    Kieda, D.
    University of Utah, USA.
    Krennrich, F.
    Iowa State University, USA.
    Kumar, S.
    University of Delaware, USA.
    Lang, M. J.
    National University of Ireland Galway, Ireland.
    Maier, G.
    DESY, Germany.
    McCann, A.
    University of Chicago, USA.
    Meagher, K.
    Georgia Institute of Technology, USA.
    Moriarty, P.
    National University of Ireland Galway, Ireland.
    Mukherjee, R.
    Columbia University, USA.
    Nieto, D.
    Columbia University, USA.
    de Bhróithe, A. O.
    DESY, Germany.
    Ong, R. A.
    University of California, USA.
    Otte, A. N.
    Georgia Institute of Technology, USA.
    Pohl, M.
    University of Potsdam, Germany ; DESY, Germany.
    Popkow, A.
    University of California, USA.
    Prokoph, Heike
    DESY, Germany.
    Pueschel, E.
    University College Dublin, Ireland.
    Quinn, J.
    University College Dublin, Ireland.
    Ragan, K.
    McGill University, Canada.
    Reynolds, P. T.
    Cork Institute of Technology, Ireland.
    Richards, G. T.
    Georgia Institute of Technology, USA.
    Roache, E.
    Harvard-Smithsonian Center for Astrophysics, USA.
    Rousselle, J.
    University of California, USA.
    Santander, M.
    Columbia University, USA.
    Sembroski, G. H.
    Purdue University, USA.
    Smith, A. W.
    University of Utah, USA.
    Staszak, D.
    McGill University, Canada.
    Telezhinsky, I.
    University of Potsdam, Germany ; DESY, Germany .
    Tucci, J. V.
    Purdue University, USA.
    Tyler, J.
    McGill University, Canada.
    Varlotta, A.
    Purdue University, USA.
    Vassiliev, V. V.
    University of California, USA.
    Wakely, S. P.
    University of Chicago, USA.
    Weinstein, A.
    Iowa State University, USA.
    Welsing, R.
    DESY, Germany.
    Williams, D. A.
    University of California, USA.
    Zitzer, B.
    Argonne National Laboratory, USA.
    The most powerful flaring activity from the NLSy1 PMN J0948+00222015In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 446, no 3, p. 2456-2467Article in journal (Refereed)
    Abstract [en]

    We report on multifrequency observations performed during 2012 December–2013 August of the first narrow-line Seyfert 1 galaxy detected in γ-rays, PMN J0948+0022 (z = 0.5846). A γ-ray flare was observed by the Large Area Telescope on board Fermi during 2012 December–2013 January, reaching a daily peak flux in the 0.1–100 GeV energy range of (155 ± 31) × 10−8 ph cm−2 s−1 on 2013 January 1, corresponding to an apparent isotropic luminosity of ∼1.5 × 1048 erg s−1. The γ-ray flaring period triggered Swift and Very Energetic Radiation Imaging Telescope Array System (VERITAS) observations in addition to radio and optical monitoring by Owens Valley Radio Observatory, Monitoring Of Jets in Active galactic nuclei with VLBA Experiments, and Catalina Real-time Transient Survey. A strong flare was observed in optical, UV, and X-rays on 2012 December 30, quasi-simultaneously to the γ-ray flare, reaching a record flux for this source from optical to γ-rays. VERITAS observations at very high energy (E > 100 GeV) during 2013 January 6–17 resulted in an upper limit of F>0.2 TeV < 4.0 × 10−12 ph cm−2 s−1. We compared the spectral energy distribution (SED) of the flaring state in 2013 January with that of an intermediate state observed in 2011. The two SEDs, modelled as synchrotron emission and an external Compton scattering of seed photons from a dust torus, can be modelled by changing both the electron distribution parameters and the magnetic field.

  • 53.
    Franke, R.
    et al.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Holler, M.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Kaminsky, B.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Karg, T.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Prokoph, Heike
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Schönwald, A.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Schwerdt, C.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Stößl, A.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    Walter, M.
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    CosMO - a cosmic muon observer experiment for students2013Conference paper (Other academic)
    Abstract [en]

    What are cosmic particles and where do they come from? These are questions which are not only fascinating for scientists. With the CosMO experiment high-school students can perform their own hands-on experiments and become familiar with modern scientific working methods. The detector consists of three scintillation counter boxes. An electronic board, developed by Fermilab for the QuarkNet Project, realizes the trigger condition, the data acquisition and the GPS data taking. With a Python program running on a netbook under Linux, the trigger and data taking conditions can be defined. The program also manages the data storage and the online display of particle rates. All components fit into a single notebook bag. The detector can also be operated with a small 5 Volt battery pack, independently from the power grid. Possible student experiments comprise, for instance, the measurement of cosmic particle rates in dependence on the zenith angle, particle showers in dependence on the detector distance, and the lifetime of muons. Twenty detectors have been built by DESY. They are used within the German outreach network "Netzwerk Teilchenwelt" by 15 astroparticle-research institutes for practical project works. The network program also includes workshops for teachers and the mentoring of the experiments performed by school students.

  • 54.
    Holler, M.
    et al.
    École Polytechnique, France.
    Berge, D.
    University of Amsterdam, Netherlands.
    van Eldik, C.
    Erlangen Centre for Astroparticle Physics, Germany.
    Lenain, J.-P.
    LPNHE Paris, France.
    Marandon, V.
    Max-Planck-Institut für Kernphysik, Germany.
    Murach, T.
    Humboldt-Universität zu Berlin, Germany.
    de Naurois, M.
    École Polytechnique, France.
    Parsons, R. D.
    Max-Planck-Institut für Kernphysik,. Germany.
    Prokoph, Heike
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Zaborov, D.
    École Polytechnique, France.
    Collaboration, for the H. E. S. S.
    Observations of the Crab Nebula with H.E.S.S. Phase II2015In: Proceedings of Science, 2015Conference paper (Other academic)
    Abstract [en]

    The High Energy Stereoscopic System (H.E.S.S.) phase I instrument was an array of four 100m2 mirror area Imaging Atmospheric Cherenkov Telescopes (IACTs) that has very successfully mapped the sky at photon energies above ∼ 100GeV. Recently, a 600m2 telescope was added to the centre of the existing array, which can be operated either in standalone mode or jointly with the four smaller telescopes. The large telescope lowers the energy threshold for gamma-ray observations to several tens of GeV, making the array sensitive at energies where the Fermi-LAT instrument runs out of statistics. At the same time, the new telescope makes the H.E.S.S. phase II instrument. This is the first hybrid IACT array, as it operates telescopes of different size (and hence different trigger rates) and different field of view. In this contribution we present results of H.E.S.S. phase II observations of the Crab Nebula, compare them to earlier observations, and evaluate the performance of the new instrument with Monte Carlo simulations.

  • 55.
    Petroff, E.
    et al.
    The Netherlands Institute for Radio Astronomy, Netherlands ; Swinburne University of Technology, Australia ; Australia Telescope National Facility, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Burke-Spolaor, S.
    National Radio Astronomy Observatory, USA ; West Virginia University, USA.
    Keane, E. F.
    Jodrell Bank Observatory, UK ; Swinburne University of Technology, Australia.
    McLaughlin, M. A.
    West Virginia University, USA.
    Miller, R.
    West Virginia University, USA.
    Andreoni, I.
    Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia ; Australian Astronomical Observatory, Australia.
    Bailes, M.
    Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Barr, E. D.
    Swinburne Univ Technol, Australia ; ARC Ctr Excellence All Sky Astrophys CAASTRO, Australia ; Max Planck Inst Radioastron, Germany.
    Bernard, S. R.
    Max Planck Institute for Radio Astronomy, Germany ; Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Bhandari, S.
    University of Melbourne, Australia ; Swinburne University of Technology, Australia ; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia.
    Bhat, N. D. R.
    ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia.;Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia..
    Burgay, M.
    INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy..
    Caleb, M.
    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia.;ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia.;Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia..
    Champion, D.
    Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany..
    Chandra, P.
    Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune Univ Campus, Pune 411007, Maharashtra, India..
    Cooke, J.
    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia..
    Dhillon, V. S.
    Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, UK;Inst Astrofis Canarias, E-38205 Tenerife, Spain..
    Farnes, J. S.
    Radboud Univ Nijmegen, Dept Astrophys IMAPP, POB 9010, NL-6500 GL Nijmegen, Netherlands..
    Hardy, L. K.
    Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, UK.
    Jaroenjittichai, P.
    Natl Astron Res Inst Thailand, 191 Siriphanich Bldg,Huay Kaew Rd, Chiang Mai 50200, Thailand..
    Johnston, S.
    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia..
    Kasliwal, M.
    CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA..
    Kramer, M.
    Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany.;Univ Manchester, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, UK.
    Littlefair, S. P.
    Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, UK.
    Macquart, J. P.
    Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia..
    Mickaliger, M.
    Univ Manchester, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, UK.
    Possenti, A.
    INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy..
    Pritchard, T.
    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia..
    Ravi, V.
    CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA..
    Rest, A.
    Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA..
    Rowlinson, A.
    Netherlands Inst Radio Astron, ASTRON, Postbus 2, NL-7990 AA Dwingeloo, Netherlands.;Univ Amsterdam, Aston Pannekoek Inst, Postbus NL 94249, NL-1090 GE Amsterdam, Netherlands..
    Sawangwit, U.
    Natl Astron Res Inst Thailand, 191 Siriphanich Bldg,Huay Kaew Rd, Chiang Mai 50200, Thailand..
    Stappers, B.
    Univ Manchester, Jodrell Bank, Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, UK.
    Sullivan, M.
    Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, UK.
    Tiburzi, C.
    Univ Bielefeld, Fak Phys, Postfach 100131, D-33501 Bielefeld, Germany..
    van Straten, W.
    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Mail H30,POB 218, Hawthorn, Vic 3122, Australia.;Auckland Univ Technol, Inst Radio Astron & Space Res, Private Bag 92006, Auckland 1142, New Zealand..
    Albert, A.
    Univ Haute Alsace, GRPHE, Inst Univ Technol Colmar, 34 Rue Grillenbreit BP F 68008, F-68008 Colmar, France..
    Andre, M.
    Tech Univ Catalonia, Lab Appl Bioacoust, Rambla Exposicio, E-08800 Barcelona, Spain..
    Anghinolfi, M.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Anton, G.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Ardid, M.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Aubert, J. -J
    Avgitas, T.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Baret, B.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Barrios-Marti, J.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Basa, S.
    Pole Etoile Site Chateau Gombert, LAM, Rue Frederic Joliot Curie 38, F-13388 Marseille 13, France..
    Bertin, V.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Biagi, S.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Borrnuth, R.
    Nikhef, Sci Pk, Amsterdam, Netherlands.;Leiden Univ, Huygens Karnerlingh Onnes Lab, Leiden, Netherlands..
    Bourret, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Bouwhuis, M. C.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Bruijn, R.
    Univ Amsterdam, Aston Pannekoek Inst, Postbus NL 94249, NL-1090 GE Amsterdam, Netherlands.;Nikhef, Sci Pk, Amsterdam, Netherlands..
    Brunner, J.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Busto, J.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Capone, A.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Caramete, L.
    Inst Space Sci, RO-077125 Bucharest, Magurele, Romania..
    Carr, J.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Celli, S.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Chiarusi, T.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Circella, M.
    Ist Nazl Fis Nucl, Sez Bari, Via E Orabona 4, I-70126 Bari, Italy..
    Coelho, J. A. B.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Coleiro, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Coniglione, R.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Costantini, H.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Coyle, P.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Creusot, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Deschamps, A.
    UCA, Geoazur, CNRS, Observ Cote Azur,IRD, Sophia Antipolis, France..
    De Bonis, G.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Distefano, C.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Di Palma, I.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Donzaud, C.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;Univ Paris 11, F-91405 Orsay, France..
    Dornic, D.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Drouhin, D.
    Univ Haute Alsace, GRPHE, Inst Univ Technol Colmar, 34 Rue Grillenbreit BP F 68008, F-68008 Colmar, France..
    Eberl, T.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    El Bojaddaini, I.
    Univ Mohammed 1, Lab Phys Matter & Radiat, BP 7I7, Oujda 6000, Morocco..
    Elsasser, D.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Enzenhofer, A.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Felis, I.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Fusco, L. A.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Galata, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Gay, P.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;Univ Blaise Pascal, Clermont Univ, Phys Corpusculaire Lab, CNRS IN2P3, BP 10448, F-63000 Clermont Ferrand, France..
    Geisselsoder, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Geyer, K.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Giordano, V.
    Ist Nazl Fis Nucl, Sez Catania, Viale Andrea Doria 6, I-95125 Catania, Italy..
    Gleixner, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Glotin, H.
    Aix Marseille Univ, LSIS, CNRS, ENSAM,LSIS,UMR 7296, F-13397 Marseille, France.;Univ Toulon & Var, CNRS, LSIS, UMR 7296, F-83957 La Garde, France.;Inst Univ France, E-75005 Paris, France..
    Gregoire, T.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Gracia-Ruiz, R.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Graf, K.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Hallmann, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    van Haren, H.
    Royal Netherlands Inst Sea Res NIOZ, Landsdiep 4, NL-1797 SZ Thorntje, Texel, Netherlands..
    Heijboer, A. J.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Hello, Y.
    UCA, Geoazur, CNRS, Observ Cote Azur,IRD, Sophia Antipolis, France..
    Hernandez-Rey, J. J.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Hossl, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Hofestadt, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Hugon, C.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy.;Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Illuminati, G.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain.;Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    James, C. W. C. W.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    de Jong, M.
    Nikhef, Sci Pk, Amsterdam, Netherlands.;Leiden Univ, Huygens Karnerlingh Onnes Lab, Leiden, Netherlands..
    Jongen, M.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Kadler, M.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Kalekin, O.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Katz, U.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kiessling, D.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Kouchner, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Kreter, M.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Kreykenbohm, I.
    Univ Erlangen Nurnberg, Dr Remeis Stemwarte & ECAP, Sternwartstr 7, D-96049 Bamberg, Germany..
    Kulikovskiy, V.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France.;Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Leninskie Gory, Moscow 119991, Russia..
    Lachaud, C.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Lahmann, R.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Lefevre, D.
    Aix Marseille Univ, MIO, F-13288 Marseille 9, France.;Univ Sud Toulon Var, F-83957 La Garde, France.;CNRS INSU IRD UM 110, Paris, France..
    Leonora, E.
    Ist Nazl Fis Nucl, Sez Catania, Viale Andrea Doria 6, I-95125 Catania, Italy.;Univ Catania, Dipartimento Fis & Astron, Viale Andrea Doria 6, I-95125 Catania, Italy..
    Lotze, M.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Loucatos, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Marcelin, M.
    Pole Etoile Site Chateau Gombert, LAM, Rue Frederic Joliot Curie 38, F-13388 Marseille 13, France..
    Margiotta, A.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Marinelli, A.
    Ist Nazl Fis Nucl, Sez Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy.;Univ Pisa, Dipartimento Fis, Largo B Pontecorvo 3, I-56127 Pisa, Italy..
    Martinez-Mora, J. A.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Mathieu, A.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Mele, R.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy.;Univ Naples Federico II, Dipartimento Fis, Via Cintia, I-80126 Naples, Italy..
    Melis, K.
    Univ Amsterdam, Aston Pannekoek Inst, Postbus NL 94249, NL-1090 GE Amsterdam, Netherlands.;Nikhef, Sci Pk, Amsterdam, Netherlands..
    Michael, T.
    Nikhef, Sci Pk, Amsterdam, Netherlands..
    Migliozzi, P.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy..
    Moussa, A.
    Univ Mohammed 1, Lab Phys Matter & Radiat, BP 7I7, Oujda 6000, Morocco..
    Mueller, C.
    Univ Wurzburg, Inst Theoret Phys & Astrophys, Emil Fischer Str 31, D-97074 Wurzburg, Germany..
    Nezri, E.
    Pole Etoile Site Chateau Gombert, LAM, Rue Frederic Joliot Curie 38, F-13388 Marseille 13, France..
    Pavalas, G. E.
    Inst Space Sci, RO-077125 Bucharest, Magurele, Romania..
    Pellegrino, C.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Perrina, C.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Piattelli, P.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Popa, V.
    Inst Space Sci, RO-077125 Bucharest, Magurele, Romania..
    Pradier, T.
    Univ Strasbourg, IPHC, 23 Rue Loess, F-67037 Strasbourg, France.;CNRS, UMR7178, F-67037 Strasbourg, France..
    Quinn, L.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Racca, C.
    Univ Haute Alsace, GRPHE, Inst Univ Technol Colmar, 34 Rue Grillenbreit BP F 68008, F-68008 Colmar, France..
    Riccobene, G.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Roensch, K.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Sanchez-Losa, A.
    Ist Nazl Fis Nucl, Sez Bari, Via E Orabona 4, I-70126 Bari, Italy..
    Saldana, M.
    Univ Politecn Valencia, Inst Invest Gestio Integrada Zones Costaneres IGI, C Paranimf 1, E-46730 Gandia, Spain..
    Salvadori, I.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Samtleben, D. F. E.
    Nikhef, Sci Pk, Amsterdam, Netherlands.;Leiden Univ, Huygens Karnerlingh Onnes Lab, Leiden, Netherlands..
    Sanguineti, M.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy.;Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Sapienza, P.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Schnabel, J.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Seitz, T.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Sieger, C.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Spurio, M.
    Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy..
    Stolarczyk, Th.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Taiuti, M.
    Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy.;Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy..
    Tayalati, Y.
    Univ Mohammed Rabat, Fac Sci, 4 Av Ibn Battouta,BP 1014,RP 10000, Rabat, Morocco..
    Trovato, A.
    Ist Nazl Fis Nucl, LNS, Via S Sofia 62, I-95123 Catania, Italy..
    Tselengidou, M.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Turpin, D.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Tonnis, C.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Vallage, B.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France.;CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Vallee, C.
    Aix Marseille Univ, CNRS IN2P3, CPPM UMR 7346, F-13288 Marseille, France..
    Van Elewyck, V.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Vivolo, D.
    Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy.;Univ Naples Federico II, Dipartimento Fis, Via Cintia, I-80126 Naples, Italy..
    Vizzoca, A.
    Ist Nazl Fis Nucl, Sez Roma, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy..
    Wagner, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Wilms, J.
    Univ Erlangen Nurnberg, Dr Remeis Stemwarte & ECAP, Sternwartstr 7, D-96049 Bamberg, Germany..
    Zornoza, J. D.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Zuniga, J.
    Univ Valencia, CSIC, IFIC Inst Fis Corpuscular, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain..
    Abdalla, H.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Abramowski, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.;Nikhef, Sci Pk, Amsterdam, Netherlands.;Univ Roma La Sapienza, Dipartimento Fis, Ple Aldo Moro 2, I-00185 Rome, Italy.;Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany.;Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Aharonian, F.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia..
    Benkhali, F. Ait
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Akhperjanian, A. G.
    Natl Acad Sci Republ Armenia, Marshall Baghramian Ave 24, Yerevan 0019, Armenia.;Yerevan Phys Inst, 2 Alikhanian Bros St, Yerevan 375036, Armenia..
    Andersson, T.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Anguner, E. O.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Arrieta, M.
    Univ Paris Diderot, PSLRes Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Aubert, P.
    Univ Savoie Mt Blanc, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France..
    Backes, M.
    Univ Namibia, Dept Phys, Private Bag 13301, Windhoek, Namibia..
    Balzer, A.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Barnard, M.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Tjus, J. Becker
    Ruhr Univ Bochum, Inst Theoret Phys, Lehrstuhl Weltraum & Astrophys 4, D-44780 Bochum, Germany..
    Berge, D.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Bernhard, S.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Bernlohr, K.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Blackwell, R.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Bottcher, M.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Boisson, C.
    Univ Paris Diderot, PSLRes Univ, Observ Paris, LUTH,CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France..
    Bolmont, J.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Bordas, P.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Bregeon, J.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    Brun, F.
    Univ Bordeaux, CNRS IN2P3, Ctr Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Brun, P.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Bryan, M.
    Univ Amsterdam, Astron Inst Anton Pannekoek, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands..
    Bulik, T.
    Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland..
    Capasso, M.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Casanova, S.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Inst Fizyki Jadrowej PAN, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Cerruti, M.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Chakraborty, N.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Chalme-Calvet, R.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Chaves, R. C. G.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    Chen, A.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Chevalier, J.
    Univ Savoie Mt Blanc, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France..
    Chretien, M.
    Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, Sorbonne Paris Cite,LPNHE, 4 Pl Jussieu, F-75252 Paris 5, France..
    Colafrancesco, S.
    Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa..
    Cologna, G.
    Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany..
    Condon, B.
    Univ Bordeaux, CNRS IN2P3, Ctr Nucl Bordeaux Gradignan, F-33175 Gradignan, France..
    Conrad, J.
    Stockholm Univ, Albanova Univ Ctr, Dept Phys, Oskar Klein Ctr, SE-10691 Stockholm, Sweden..
    Cui, Y.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Davids, I. D.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Decock, J.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Degrange, B.
    Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France.;CNRS, IPAG, F-38000 Grenoble, France..
    Deil, C.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Devin, J.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    de Wilt, P.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Dirson, L.
    Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Djannati-Atai, A.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Domainko, W.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Donath, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Drury, L. O 'C.
    Dubus, G.
    Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France.;CNRS, IPAG, F-38000 Grenoble, France..
    Dutson, K.
    Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, UK.
    Dyks, J.
    Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland..
    Edwards, T.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Egberts, K.
    Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany..
    Eger, P.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Ernenwein, J. -P
    Eschbach, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Farnier, Christian
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Stockholm University.
    Fegan, S.
    Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France..
    Fernandes, M. V.
    Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Fiasson, A.
    Univ Savoie Mt Blanc, Lab Annecy Le Vieux Phys Particules, CNRS IN2P3, F-74941 Annecy Le Vieux, France..
    Fontaine, G.
    Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France..
    Forster, A.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Funk, S.
    Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fussling, M.
    DESY, D-15738 Zeuthen, Germany..
    Gabici, S.
    Univ Paris Diderot, APC, CNRS IN2P3, Observ Paris,CEA IRFU,Sorbonne Paris Cite, F-75205 Paris, France..
    Gajdus, M.
    Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany..
    Gallant, Y. A.
    Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, CC 72, Pl Eugene Bataillon, F-34095 Montpellier, France..
    Garrigoux, T.
    North West Univ, Ctr Space Res, Potchefstroom 2520, ZA-2520 Potchefstroom, South Africa..
    Giavitto, G.
    DESY, D-15738 Zeuthen, Germany..
    Giebels, B.
    Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, F-91128 Palaiseau, France..
    Glicenstein, J. F.
    CEA Saclay, Direct Sci Matiere, Inst Rech Lois Fondamentales Univers, Serv Phys Particules, F-91191 Gif Sur Yvette, France..
    Gottschall, D.
    Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany..
    Goya, A.
    Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland..
    Grondin, M. -H
    Hadasch, D.
    Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria..
    Hahn, J.
    Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
    Haupt, M.
    DESY, D-15738 Zeuthen, Germany..
    Hawkes, J.
    Univ Adelaide, Sch Phys Sci, Adelaide, SA 5005, Australia..
    Heinzelmann, G.
    Univ Hamburg, Inst Phys Expt, Luruper Chaussee 149, D-22761 Hamburg, Germany..
    Henri, G.
    Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France.;CNRS, IPAG, F-38000 Grenoble, France..
    Prokhorov, Dmitry
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Prokoph, Heike
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Punch, Michael
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Univ Paris Diderot, France.
    A polarized fast radio burst at low Galactic latitude2017In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 469, no 4, p. 4465-4482Article in journal (Refereed)
    Abstract [en]

    We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 +/- 0.8 pc cm(-3), a pulse duration of 2.8(-0.5)(+1.2) ms, and a measured peak flux density assuming that the burst was at beam centre of 0.7(-0.1)(+0.2) Jy. The FRB originated at a Galactic longitude and latitude of 24.66 degrees, 5.28 degrees and 25 degrees away from the Galactic Center. The burst was found to be 43 +/- 5 per cent linearly polarized with a rotation measure (RM) in the range -9 < RM < 12 rad m(-2) (95 per cent confidence level), consistent with zero. The burst was followed up with 11 telescopes to search for radio, optical, X-ray, gamma-ray and neutrino emission. Neither transient nor variable emission was found to be associated with the burst and no repeat pulses have been observed in 17.25 h of observing. The sightline to the burst is close to the Galactic plane and the observed physical properties of FRB 150215 demonstrate the existence of sight lines of anomalously low RM for a given electron column density. The Galactic RM foreground may approach a null value due to magnetic field reversals along the line of sight, a decreased total electron column density from the Milky Way, or some combination of these effects. A lower Galactic DM contribution might explain why this burst was detectable whereas previous searches at low latitude have had lower detection rates than those out of the plane.

  • 56.
    Prokoph, Heike
    Deutsches Elektronen-Synchrotron (DESY), Germany.
    VERITAS Observations of Relativistic Outflows in Low- and Intermediate-Frequency BL Lac Objects2014In: International Journal of Modern Physics, Conference Series, ISSN 2010-1945, Vol. 28, article id 1460178Article in journal (Refereed)
    Abstract [en]

    The majority of blazars detected at very high energies (VHE; E > 100 GeV) are high-frequency-peaked BL Lac objects (HBLs). Low- and intermediate-frequency-peaked BL Lacs (LBLs/IBLs with synchrotron-peak frequencies in the infrared and optical regime) are generally more powerful, more luminous, and have a richer jet environment than HBLs. However, only a handful of these IBL and LBLs have been detected by ground-based gamma-ray telescopes, typically during high-flux states. The VERITAS array has been monitoring five known VHE LBLs/IBLs since 2009: 3C 66A, W Comae, PKS 1424+240, S5 0716+714 and BL Lacertae, with typical exposures of 5-10 hours per year. The results of these long-term observations are presented, including a bright, subhour-scale VHE flare of BL Lacertae in June 2011, the first low-state detections of 3C 66A and W Comae, and the detection and characterization of the IBL B2 1215+30.

  • 57.
    Prokoph, Heike
    et al.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Becherini, Yvonne
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Böttcher, M.
    North-West University, South Africa.
    Boisson, C.
    Université Paris Diderot, France.
    Lenain, J.-P.
    Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, France.
    Sushch, I.
    North-West University, South Africa.
    Collaboration, for the H. E. S. S.
    H.E.S.S. discovery of very-high-energy gamma-ray emission of PKS 1440-3892015In: Proceedings of Science, SISSA , 2015Conference paper (Other academic)
    Abstract [en]

    Blazars are the most abundant class of known extragalactic very-high-energy (VHE, E>100 GeV) gamma-ray sources. However, one of the biggest difficulties in investigating their VHE emission resides in their limited number, since less than 60 of them are known by now. In this contribution we report on H.E.S.S. observations of the BL Lac object PKS 1440-389. This source has been selected as target for H.E.S.S. based on its high-energy gamma-ray properties measured by Fermi-LAT. The extrapolation of this bright, hard-spectrum gamma-ray blazar into the VHE regime made a detection on a relatively short time scale very likely, despite its uncertain redshift. H.E.S.S. observations were carried out with the 4-telescope array from February to May 2012 and resulted in a clear detection of the source. Contemporaneous multi-wavelength data are used to construct the spectral energy distribution of PKS 1440-389 which can be described by a simple one-zone synchrotron-self Compton model

  • 58.
    Prokoph, Heike
    et al.
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Collaboration, VERITAS
    Da Vela, P.
    Università di Siena and INFN Pisa, Italy.
    Schultz, C.
    Università di Padova and INFN, Italy.
    Collaboration, MAGIC
    Time-resolved multiwavelength observations of the blazar VER J0521+211 from radio to gamma-ray energies2015In: Proceedings of the 34th International Cosmic Ray Conference (ICRC2015), The Hague (The Netherlands), 2015Conference paper (Other academic)
    Abstract [en]

    VER J0521+211 (RGB J0521.8+2112) is one of the brightest and most powerful blazars detected in the TeV gamma-ray regime. It is located at a redshift of z=0.108 and since its discovery in 2009, VER J0521+211 has exhibited an average TeV flux exceeding 0.1 times that of the Crab Nebula, corresponding to an isotropic luminosity of 3×1044 erg s−1. We present data from a comprehensive multiwavelength campaign on this object extending between November 2012 and February 2014, including single-dish radio observations, optical photometry and polarimetry, UV, X-ray, GeV and TeV gamma-ray data (VERITAS, MAGIC). Significant flux variability was observed at all wavelengths, including a long-lasting high state at gamma-ray energies in Fall 2013. Nightly-resolved spectra at X-ray and TeV energies are be presented, and emission mechanisms explaining the observed flux and spectral variability are discussed. 

  • 59. Stamatescu, V.
    et al.
    Becherini, Yvonne
    APC Paris.
    Bernloehr, K.
    Carmona, E.
    Colin, P.
    Farnier, C.
    Gerard, L.
    Hinton, J. A.
    Khelifi, B.
    Komin, N.
    Lamanna, G.
    Lenain, J. -P
    Maier, G.
    Moralejo, A.
    Naumann, C. L.
    Parsons, D.
    Di Pierro, F.
    Prokoph, Heike
    Vorobiov, S.
    Towards an optimized design for the Cherenkov Telescope Array2012In: HIGH ENERGY GAMMA-RAY ASTRONOMY, American Institute of Physics (AIP), 2012, p. 758-761Conference paper (Refereed)
    Abstract [en]

    The Cherenkov Telescope Array (CTA) is a future instrument for very-high-energy (VHE) gamma-ray astronomy that is expected to deliver an order of magnitude improvement in sensitivity over existing instruments. In order to meet the physics goals of CTA in a cost-effective way, Monte Carlo simulations of the telescope array are used in its design. Specifically, we simulate large arrays comprising numerous large-size, medium-size and small-size telescopes whose configuration parameters are chosen based on current technical design studies and understanding of the costs involved. Subset candidate arrays with various layout configurations are then selected and evaluated in terms of key performance parameters, such as the sensitivity. This is carried out using a number of data analysis methods, some of which were developed within the field and extended to CTA, while others were developed specifically for this purpose. We outline some key results from recent studies that illustrate our approach to the optimization of the CTA design.

  • 60.
    Zacharias, M.
    et al.
    Heidelberg Univ, Germany ; North West Univ, South Africa.
    Bottcher, M.
    North West Univ, South Africa.
    Chakraborty, N.
    Max Planck Inst Kernphys, Germany.
    Cologna, G.
    Heidelberg Univ, Germany.
    Jankowsky, F.
    Heidelberg Univ, Germany.
    Lenain, J. -P
    Mohamed, M.
    Heidelberg Univ, Germany.
    Prokoph, Heike
    Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
    Wagner, S.
    Heidelberg Univ, Germany.
    Wierzcholska, A.
    Inst Fizyki Jadrowej PAN, Poland.
    Zaborov, D.
    Ecole Polytech, CNRS, France.
    The Complex VHE And Multiwavelength Flaring Activity Of The FSRQ PKS 1510-089 In May 20152017In: HIGH ENERGY GAMMA-RAY ASTRONOMY / [ed] Aharonian, FA Hofmann, W Rieger, FM, American Institute of Physics (AIP), 2017, article id UNSP 050023Conference paper (Refereed)
    Abstract [en]

    The blazar PKS 1510-089 was the first of the flat spectrum radio quasar type, which had been detected simultaneously by a ground based Cherenkov telescope (H.E.S.S.) and the LAT instrument on board the Fermi satellite. Given the strong broad line region emission defining this blazar class, and the resulting high optical depth for VHE (E > 100 GeV) gamma-rays, it was surprising to detect VHE emission from such an object. In May 2015, PKS 1510-089 exhibited high states throughout the electromagnetic spectrum. Target of Opportunity observations with the H.E.S.S. experiment revealed strong and unprecedented variability of this source. Comparison with the lightcurves obtained with the Fermi-LAT in HE gamma-rays (100 MeV < E < 100 GeV) and ATOM in the optical band shows a complex relationship between these energy bands. This points to a complex structure of the emission region, since the one-zone model has difficulties to reproduce the source behavior even when taking into account absorption by ambient soft photon fields. It will be shown that the presented results have important consequences for the explanation of FSRQ spectra and lightcurves, since the emission region cannot be located deep inside the broad line region as is typically assumed. Additionally, acceleration and cooling processes must be strongly time-dependent in order to account for the observed variability patterns.

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