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          Institute: MPI für Kernphysik     Collection: High-Energy Astrophysics     Display Documents

ID: 292011.0, MPI für Kernphysik / High-Energy Astrophysics
Fast Variability of Tera–Electron Volt gamma Rays from the Radio Galaxy M87
Authors:Aharonian, Felix; Akhperjanian, A. G.; Bazer-Bachi, A. R.; Beilicke, M.; Benbow, Wystan; Berge, David; Bernlöhr, K.; Boisson, C.; Bolz, Oliver; Borrel, V.; Braun, Isabel; Brown, A. M.; Bühler, Rolf; Büsching, I.; Carrigan, Svenja; Chadwick, P. M.; Chounet, L.-M.; Cornils, R.; Costamante, L.; Degrange, B.; Djannati-Atai, A.; Drury, L.O'C.; Emmanoulopoulos, D.; Espigat, P.; Feinstein, F.; Ferrero, E.; Fontaine, G.; Funk, S.; Gallant, Y. A.; Giebels, B.; Glicenstein, J. F.; Goret, P.; Hadjichristidis, C.; Hauser, Dominik; Hauser, M.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Holleran, M.; Horns, D.; de Jager, O. C.; Khélifi, B.; Komin, N.; Konopelko, A.; Latham, I. J.; Le Gallou, R.; Lemière, A.; Lemoine-Goumard, M.; Lohse, T.; Martineau-Huynh, O.; Marcowith, A.; Masterson, C.; McComb, T. J. L.; de Naurois, M.; Nedbal, Dalibor; Nolan, S. J.; Noutsos, A.; Orford, K. J.; Osborne, J. L.; Ouchrif, M.; Panter, Michael; Pelletier, G.; Pita, S.; Pühlhofer, G.; Punch, M.; Raubenheimer, B. C.; Raue, M.; Rayner, S. M.; Reimer, A.; Rosier-Lees, S.; Ripken, J.; Rob, L.; Rolland, L.; Rowell, Gavin; Sahakian, V.; Saugé, L.; Schlenker, S.; Schlickeiser, R.; Schröder, R.; Schwanke, U.; Sol, H.; Spangler, D.; Steenkamp, R.; Stegmann, C.; Tavernet, J.-P-; Terrier, R.; Tluczykont, M.; Vasileiadis, G.; Venter, C.; Vincent, P.; Völk, H. J.; Wagner, S. J.; Ward, M.; Bolz, O.; Dickinson, H. J.; Dubus, G.; Egberts, Kathrin; Fiasson, A.; Funk, S.; Jacholkowska, A.; Kosack, K.; Martin, J. M.; Spanier, F.; Superina, G.; Tam, P. H.; van Eldik, C.; Hoffmann, A.; Coignet, G.; Funk, Seb.; Füßling, M.; Kendziorra, E.; Kerschhaggl, M.; Lamanna, G.; Lenain, J.-P.; Moulin, E.; Ranchon, S.; Schwarzburg, S.; Schwemmer, S.; Vialle, J. P.
Corporate body:F. Aharonian et al. for the H.E.S.S. Collaboration
Research Context:H.E.S.S.
Date of Publication (YYYY-MM-DD):2006-12-01
Title of Journal:Science
Issue / Number:5804
Start Page:1424
End Page:1427
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The detection of fast variations of the tera–electron volt (TeV) (1012 eV) gamma-ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times as fast as those observed in any other wave band and imply a very compact emission region with a dimension similar to the Schwarzschild radius of the central black hole. We thus can exclude
several other sites and processes of the g-ray production. The observations confirm that TeV gamma rays are emitted by extragalactic sources other than blazars, where jets are not relativistically beamed toward the observer.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group of W. Hofmann/High Energy Astrophysics (F. Aharonian)
MPI für Kernphysik/Group of W. Hofmann/Experimental High-Energy Astrophysics (M. Panter, G. Hermann)
External Affiliations:Yerevan Physics Institute, 2 Alikhanian Brothers St., 375036 Yerevan, Armenia
Centre d'Étude Spatiale des Rayonnements, CNRS/UPS, 9 Av. du Colonel Roche, BP 4346, 31029 Toulouse Cedex 4, France
Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany
Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
LUTH, UMR 8102 du CNRS, Observatoire de Paris, Section de Meudon, 92195 Meudon Cedex, France
University of Durham, Department of Physics, South Road, Durham DH1 3LE, UK
Unit for Space Physics, North-West University, Potchefstroom 2520, South Africa
Laboratoire Leprince-Ringuet, IN2P3/CNRS, École Polytechnique, 91128 Palaiseau, France
European Associated Laboratory for Gamma-Ray Astronomy, jointly supported by CNRS and MPG
APC, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France
Dublin Institute for Advanced Studies, 5 Merrion Square, Dublin 2, Ireland
Landessternwarte, Universität Heidelberg, Königstuhl, 69117 Heidelberg, Germany
Laboratoire de Physique Théorique et Astroparticules, IN2P3/CNRS, Université Montpellier II, CC 70, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
DAPNIA/DSM/CEA, CE Saclay, 91191 Gif-sur-Yvette, Cedex, France
Laboratoire d'Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, 72076 Tübingen, Germany
Laboratoire de Physique Nucléaire et de Hautes Énergies, IN2P3/CNRS, Universités Paris VI & VII, 4 place Jussieu, 75252 Paris Cedex 5, France
Institute of Particle and Nuclear Physics, Charles University, V Holesovickach 2, 180 00 Prague 8, Czech Republic
Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, 44780 Bochum, Germany
University of Namibia, Private Bag 13301, Windhoek, Namibia
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