Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3
A. Abdo, A. / Ackermann, M. / Ajello, M. / Axelsson, M. / Baldini, L. / Ballet, J. / Barbiellini, G. / Bastieri, D. / Baughman, B. M. / Bechtol, K. / Bellazzini, R. / Berenji, B. / Blandford, R. D. / Bloom, E. D. / Bonamente, E. / Borgland, A. W. / Brez, A. / Brigida, M. / Bruel, P. / Burnett, T. H. / Buson, S. / Caliandro, G. A. / Caraveo, P. A. / Casandjian, J. M. / Cecchi, C. / Celik, O. / Chaty, S. / Cheung, C.C. / Chiang, J. / Ciprini, S. / Claus, R. / Cohen-Tanugi, J. / Cominski, L.R. / Conrad, J. / Corbel, S. / Corbet, R. / Dermer, C. D. / De Palma, F. / Digel, S. W. / Do Couto E Silva, E. / Drell, P.S. / Dubois, R. / Dubus, G. / Dumora, D. / Farnier, C. / Favuzzi, C. / Fegan, S.J. / Focke, W. B. / Fortin, P. / Frailis, M. / Fusco, P. / Gargano, F. / Gehrels, N. / Germani, S. / Giavitto, G. / Giebels, B. / Giglietto, N. / Giordano, F. / 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. / Hill, A.B. / Hjalmarsdotter, L. / Horan, D. / Hughes, R. E. / Jackson, M.S. / Jóhannesson, G. / Johnson, A. S. / Johnson, T. J. / Johnson, W. N. / Kamae, T. / Katagiri, H. / Kawai, N. / Kerr, M. / Knödlseder, J. / Kocian, M. L. / Koerding, E. / Kuss, M. / Lande, J. / Latronico, L. / Lemoine-Goumard, M. / Longo, F. / Loparco, F. / Lott, B. / Lovellette, M.N. / Lubrano, P. / Madejski, G. M. / Makeev, A. / Marchand, L. / Marelli, M. / Max-Moerbeck, W. / Mazziotta, M.N. / Mccoll, N. / Mcenery, J.E. / Meurer, C. / Michelson, P.F. / Migliari, S. / Mitthumsiri, W. / Mizuno, T. / Monte, C. / Monzani, M.E. / Morselli, A. / Moskalenko, I.V. / Murgia, S. / Nolan, P.L. / Norris, J.P. / Nuss, E. / Ohsugi, T. / Omodei, N. / Ong, R.A. / Ormes, J.F. / Paneque, D. / Parent, D. / Pelassa, V. / Pepe, M. / Pesce-Rollins, M. / Piron, F. / Pooley, G. / Porter, T.A. / Pottschmidt, K. / Rainò, S. / Rando, R. / Ray, P.S. / Razzano, M. / Rea, N. / Readhead, A. / Reimer, A. / Reimer, O. / Richards, J.L. / Rochester, L. S. / Rodriguez, J. / Rodriguez, A. Y. / Romani, R.W. / Ryde, F. / Sadrosinski, H.F-W. / Sander, A. / Saz Parkinson, P.M. / Sgro, G. / Siskind, E. J. / Smith, D.A. / Smith, P.D. / Spinelli, P. / Starck, Jean-Luc / Stevenson, M. / Strickman, M.S. / Takahashi, H. / Tanaka, Y. / Thayer, J. B. / Thompson, D.J. / Tibaldo, L. / Tomsick, J.A. / Torres, D. F. / Tosti, G. / Tramacere, A. / Uchiyama, Y. / Usher, T.L. / Vasileiou, V. / Vilchez, N. / Vitale, V. / Waite, A. P. / Wang, P. / Wilms, J. / Winer, B. L. / Wood, K. S. / Ylinen, T. / Ziegler, M. - 2009
Microquasars are accreting black holes or neutron stars in binary systems with associated relativistic jets. Despite their frequent outburst activity, they have never been unambiguously detected emitting high-energy gamma rays. The Fermi Large Area Telescope (LAT) has detected a variable high-energy source coinciding with the position of the x-ray binary and microquasar Cygnus X-3. Its identification with Cygnus X-3 is secured by the detection of its orbital period in gamma rays, as well as the correlation of the LAT flux with radio emission from the relativistic jets of Cygnus X-3. The gamma-ray emission probably originates from within the binary system, opening new areas in which to study the formation of relativistic jets.
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