%0 Journal Article
%T Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
%+ Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112))
%+ Laboratoire Leprince-Ringuet (LLR)
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%+ Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG)
%+ Centre d'étude spatiale des rayonnements (CESR)
%A A. Abdo, A.
%A Ackermann, Markus
%A Ajello, Marco
%A B. Atwood, W.
%A Axelsson, Magnus
%A Baldini, Luca
%A Ballet, Jean
%A Barbiellini, Guido
%A Bastieri, D.
%A Bechtol, K.
%A Bellazzini, R.
%A Berenji, B.
%A Blandford, R. D.
%A Bloom, E.D.
%A Bonamente, E.
%A Borgland, A.W.
%A Bregeon, J.
%A Brez, A.
%A Brigida, M.
%A Bruel, Pascal
%A Burnett, T.H.
%A Caliandro, G.A.
%A Cameron, R.A.
%A Cannon, A.
%A Caraveo, P. A.
%A Casandjian, J.M.
%A Cavazzuti, E.
%A Cecchi, C.
%A Celik, O.
%A Charles, E.
%A Cheung, C.C.
%A Chiang, J.
%A Ciprini, S.
%A Claus, R.
%A Cohen-Tanugi, J.
%A Colafrancesco, S.
%A Conrad, J.
%A Costamante, L.
%A Cutini, S.
%A Davis, D.S.
%A Dermer, C.D.
%A de Angelis, A.
%A de Palma, F.
%A Digel, S.W.
%A Donato, D.
%A Do Couto E Silva, E.
%A Drell, P.S.
%A Dubois, R.
%A Dumora, D.
%A Edmonds, Y.
%A Farnier, C.
%A Favuzzi, C.
%A Fegan, S.J.
%A Finke, J.
%A Focke, W.B.
%A Fortin, P.
%A Frailis, M.
%A Fukazawa, Y.
%A Funk, S.
%A Fusco, P.
%A Gargano, F.
%A Gasparrini, D.
%A Gehrels, N.
%A Georganopoulos, M.
%A Germani, S.
%A Giebels, B.
%A Giglietto, N.
%A Giommi, P.
%A Giordano, F.
%A Giroletti, M.
%A Glanzman, T.
%A Godfrey, G.
%A Grenier, I.A.
%A Grondin, M.H.
%A Grove, J.E.
%A Guillemot, L.
%A Guiriec, S.
%A Hanabata, Y.
%A Harding, A.K.
%A Hayashida, M.
%A Hays, E.
%A Horan, D.
%A Jóhannesson, G.
%A Johnson, A.S.
%A Johnson, R.P.
%A Johnson, T.J.
%A Johnson, W.N.
%A Kamae, T.
%A Katagiri, H.
%A Kataoka, J.
%A Kawai, N.
%A Kerr, M.
%A Knödlseder, Jürgen
%A Kocian, M. L.
%A Kuss, M.
%A Lande, J.
%A Latronico, L.
%A Lemoine-Goumard, M.
%A Longo, F.
%A Loparco, F.
%A Lott, B.
%A Lovellette, M.N.
%A Lubrano, P.
%A Madjeski, G.M.
%A Makeev, A.
%A Mazziotta, M.N.
%A Mcconville, W.
%A Mcenery, J.E.
%A Meurer, C.
%A Michelson, P.F.
%A Mitthumsiri, W.
%A Mizuno, T.
%A Moiseev, A.A.
%A Monte, C.
%A Monzani, M.E.
%A Morselli, A.
%A Moskalenko, I.V.
%A Murgia, S.
%A Nolan, P.L.
%A Norris, J. P.
%A Nuss, E.
%A Ohsugi, T.
%A Omodei, N.
%A Orlando, E.
%A Ormes, J.F.
%A Ozaki, M.
%A Paneque, D.
%A Panetta, J.H.
%A Parent, D.
%A Pelassa, V.
%A Pepe, M.
%A Pesce-Rollins, M.
%A Piron, F.
%A Porter, T.A.
%A Rainò, S.
%A Rando, R.
%A Razzano, M.
%A Reimer, A.
%A Reposeur, T.
%A Ritz, S.
%A Rochester, L.S.
%A Rodriguez, A. Y.
%A Romani, R.W.
%A Ryde, F.
%A Sadrozinski, H. F.-W.
%A Sambruna, R.
%A Sanchez, D.
%A Saz Parkinson, P.M.
%A Scargle, J.D.
%A Sgrò, C.
%A Shaw, M.
%A Smith, D. A.
%A Smith, P. D.
%A Spandre, G.
%A Spinelli, P.
%A Strickman, M.S.
%A Suson, D.J.
%A Tajima, H.
%A Takahashi, H.
%A Tanaka, T.
%A Taylor, G.B.
%A Thayer, J.B.
%A Thompson, D.J.
%A Tibaldo, L.
%A Torres, D.F.
%A Tosti, G.
%A Tramacere, A.
%A Uchiyama, Y.
%A Usher, T.L.
%A Vasileiou, V.
%A Vilchez, N.
%A Waite, A. P.
%A Wang, P.
%A Winer, B. L.
%A Wood, K. S.
%A Ylinen, T.
%A Ziegler, M.
%A Harris, D.E.
%A Massaro, F.
%A Stawarz, L.
%Z ApJ, accepted, 6 pages, 4 figures. Corresponding authors: C.C. Cheung, W. McConville
%< avec comité de lecture
%@ 0004-637X
%J The Astrophysical Journal
%I American Astronomical Society
%V 707
%P 55-60
%8 2009-12-10
%D 2009
%Z 0910.3565
%R 10.1088/0004-637X/707/1/55
%Z Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Journal articles
%X We report the Fermi-LAT discovery of high-energy (MeV/GeV) gamma-ray emission positionally consistent with the center of the radio galaxy M87, at a source significance of over 10 sigma in ten-months of all-sky survey data. Following the detections of Cen A and Per A, this makes M87 the third radio galaxy seen with the LAT. The faint point-like gamma-ray source has a >100 MeV flux of 2.45 (+/- 0.63) x 10^-8 ph cm^-2 s^-1 (photon index = 2.26 +/- 0.13) with no significant variability detected within the LAT observation. This flux is comparable with the previous EGRET upper limit (< 2.18 x 10^-8 ph cm^-2 s^-1, 2 sigma), thus there is no evidence for a significant MeV/GeV flare on decade timescales. Contemporaneous Chandra and VLBA data indicate low activity in the unresolved X-ray and radio core relative to previous observations, suggesting M87 is in a quiescent overall level over the first year of Fermi-LAT observations. The LAT gamma-ray spectrum is modeled as synchrotron self-Compton (SSC) emission from the electron population producing the radio-to-X-ray emission in the core. The resultant SSC spectrum extrapolates smoothly from the LAT band to the historical-minimum TeV emission. Alternative models for the core and possible contributions from the kiloparsec-scale jet in M87 are considered, and can not be excluded.
%G English
%Z Fermi-LAT
%L in2p3-00440769
%U https://hal.in2p3.fr/in2p3-00440769
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%~ CEA
%~ INSU
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%~ UNIV-PARIS7
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%~ UNIV-TLSE3
%~ CENBG
%~ LPTA
%~ LLR
%~ CNRS
%~ UNIV-MONTP2
%~ CNES
%~ OMP
%~ OMP-CESR
%~ OMP-IRAP
%~ X-LLR
%~ X-DEP
%~ X-DEP-PHYS
%~ DSM-IRFU
%~ IRFU-AIM
%~ UNIV-MONTPELLIER
%~ CEA-DRF
%~ UNIV-PARIS
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