Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
- A. Abdo, A.
- Ackermann, Markus
- Ajello, Marco
- B. Atwood, W.
- Axelsson, Magnus
- Baldini, Luca
- Ballet, Jean
- Barbiellini, Guido
- Bastieri, D.
- Bechtol, K.
- Bellazzini, R.
- Berenji, B.
- Blandford, R. D.
- Bloom, E.D.
- Bonamente, E.
- Borgland, A.W.
- Bregeon, J.
- Brez, A.
- Brigida, M.
- Bruel, Pascal
- Burnett, T.H.
- Caliandro, G.A.
- Cameron, R.A.
- Cannon, A.
- Caraveo, P. A.
- Casandjian, J.M.
- Cavazzuti, E.
- Cecchi, C.
- Celik, O.
- Charles, E.
- Cheung, C.C.
- Chiang, J.
- Ciprini, S.
- Claus, R.
- Cohen-Tanugi, J.
- Colafrancesco, S.
- Conrad, J.
- Costamante, L.
- Cutini, S.
- Davis, D.S.
- Dermer, C.D.
- De Angelis, A.
- De Palma, F.
- Digel, S.W.
- Donato, D.
- Do Couto E Silva, E.
- Drell, P.S.
- Dubois, R.
- Dumora, D.
- Edmonds, Y.
- Farnier, C.
- Favuzzi, C.
- Fegan, S.J.
- Finke, J.
- Focke, W.B.
- Fortin, P.
- Frailis, M.
- Fukazawa, Y.
- Funk, S.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Gehrels, N.
- Georganopoulos, M.
- Germani, S.
- Giebels, B.
- Giglietto, N.
- Giommi, P.
- Giordano, F.
- Giroletti, M.
- Glanzman, T.
- Godfrey, G.
- Grenier, I.A.
- Grondin, M.H.
- Grove, J.E.
- Guillemot, L.
- Guiriec, S.
- Hanabata, Y.
- Harding, A.K.
- Hayashida, M.
- Hays, E.
- Horan, D.
- Jóhannesson, G.
- Johnson, A.S.
- Johnson, R.P.
- Johnson, T.J.
- Johnson, W.N.
- Kamae, T.
- Katagiri, H.
- Kataoka, J.
- Kawai, N.
- Kerr, M.
- Knödlseder, Jürgen
- Kocian, M. L.
- Kuss, M.
- Lande, J.
- Latronico, L.
- Lemoine-Goumard, M.
- Longo, F.
- Loparco, F.
- Lott, B.
- Lovellette, M.N.
- Lubrano, P.
- Madjeski, G.M.
- Makeev, A.
- Mazziotta, M.N.
- Mcconville, W.
- Mcenery, J.E.
- Meurer, C.
- Michelson, P.F.
- Mitthumsiri, W.
- Mizuno, T.
- Moiseev, A.A.
- Monte, C.
- Monzani, M.E.
- Morselli, A.
- Moskalenko, I.V.
- Murgia, S.
- Nolan, P.L.
- Norris, J. P.
- Nuss, E.
- Ohsugi, T.
- Omodei, N.
- Orlando, E.
- Ormes, J.F.
- Ozaki, M.
- Paneque, D.
- Panetta, J.H.
- Parent, D.
- Pelassa, V.
- Pepe, M.
- Pesce-Rollins, M.
- Piron, F.
- Porter, T.A.
- Rainò, S.
- Rando, R.
- Razzano, M.
- Reimer, A.
- Reposeur, T.
- Ritz, S.
- Rochester, L.S.
- Rodriguez, A. Y.
- Romani, R.W.
- Ryde, F.
- Sadrozinski, H. F.-W.
- Sambruna, R.
- Sanchez, D.
- Saz Parkinson, P.M.
- Scargle, J.D.
- Sgrò, C.
- Shaw, M.
- Smith, D. A.
- Smith, P. D.
- Spandre, G.
- Spinelli, P.
- Strickman, M.S.
- Suson, D.J.
- Tajima, H.
- Takahashi, H.
- Tanaka, T.
- Taylor, G.B.
- Thayer, J.B.
- Thompson, D.J.
- Tibaldo, L.
- Torres, D.F.
- Tosti, G.
- Tramacere, A.
- Uchiyama, Y.
- Usher, T.L.
- Vasileiou, V.
- Vilchez, N.
- Waite, A. P.
- Wang, P.
- Winer, B. L.
- Wood, K. S.
- Ylinen, T.
- Ziegler, M.
- Harris, D.E.
- Massaro, F.
- Stawarz, L.
DOIAbstract
ApJ, accepted, 6 pages, 4 figures. Corresponding authors: C.C. Cheung, W. McConvilleWe 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 significa...
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