Abdo, A. A. and Ackermann, M. and Ajello, M. and Axelsson, M. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Baughman, B. M. and Bechtol, K. and Bellazzini, R. and Berenji, B. and Blandford, R. D. and Bloom, E. D. and Bonamente, E. and Borgland, A. W. and Brez, A. and Brigida, M. and Bruel, P. and Burnett, T. H. and Buson, S. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Casandjian, J. M. and Cecchi, C. and Çelik, Ö. and Chaty, S. and Cheung, C. C. and Chiang, J. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Cominsky, L. R. and Conrad, J. and Corbel, S. and Corbet, R. and Dermer, C. D. and de Palma, F. and Digel, S. W. and do Couto e Silva, E. and Drell, P. S. and Dubois, R. and Dubus, G. and Dumora, D. and Farnier, C. and Favuzzi, C. and Fegan, S. J. and Focke, W. B. and Fortin, P. and Frailis, M. and Fusco, P. and Gargano, F. and Gehrels, N. and Germani, S. and Giavitto, G. and Giebels, B. and Giglietto, N. and Giordano, F. and Glanzman, T. and Godfrey, G. and Grenier, I. A. and Grondin, M. -H. and Grove, J. E. and Guillemot, L. and Guiriec, S. and Hanabata, Y. and Harding, A. K. and Hayashida, M. and Hays, E. and Hill, A. B. and Hjalmarsdotter, L. and Horan, D. and Hughes, R. E. and Jackson, M. S. and Jóhannesson, G. and Johnson, A. S. and Johnson, T. J. and Johnson, W. N. and Kamae, T. and Katagiri, H. and Kawai, N. and Kerr, M. and Knödlseder, J. and Kocian, M. L. and Koerding, E. and Kuss, M. and Lande, J. and Latronico, L. and Lemoine-Goumard, M. and Longo, F. and Loparco, F. and Lott, B. and Lovellette, M. N. and Lubrano, P. and Madejski, G. M. and Makeev, A. and Marchand, L. and Marelli, M. and Max-Moerbeck, W. and Mazziotta, M. N. and McColl, N. and McEnery, J. E. and Meurer, C. and Michelson, P. F. and Migliari, S. and Mitthumsiri, W. and Mizuno, T. and Monte, C. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Nolan, P. L. and Norris, J. P. and Nuss, E. and Ohsugi, T. and Omodei, N. and Ong, R. A. and Ormes, J. F. and Paneque, D. and Parent, D. and Pelassa, V. and Pepe, M. and Pesce-Rollins, M. and Piron, F. and Pooley, G. and Porter, T. A. and Pottschmidt, K. and Rainò, S. and Rando, R. and Ray, P. S. and Razzano, M. and Rea, N. and Readhead, A. and Reimer, A. and Reimer, O. and Richards, J. L. and Rochester, L. S. and Rodriguez, J. and Rodriguez, A. Y. and Romani, R. W. and Ryde, F. and Sadrozinski, H. F.-W. and Sander, A. and Saz Parkinson, P. M. and Sgrò, C. and Siskind, E. J. and Smith, D. A. and Smith, P. D. and Spinelli, P. and Starck, J.-L. and Stevenson, M. and Strickman, M. S. and Suson, D. J. and Takahashi, H. and Tanaka, T. and Thayer, J. B. and Thompson, D. J. and Tibaldo, L. and Tomsick, J. A. and Torres, D. F. and Tosti, G. and Tramacere, A. and Uchiyama, Y. and Usher, T. L. and Vasileiou, V. and Vilchez, N. and Vitale, V. and Waite, A. P. and Wang, P. and Wilms, J. and Winer, B. L. and Wood, K. S. and Ylinen, T. and Ziegler, M. (2009) Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3. Science, 326 (5959). pp. 1512-1516. ISSN 0036-8075 http://resolver.caltech.edu/CaltechAUTHORS:20100204-093303863
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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.
|Additional Information:||© 2009 American Association for the Advancement of Science. Received 18 September 2009; accepted 5 November 2009. Published online 26 November 2009. The Fermi LAT Collaboration acknowledges support from a number of agencies and institutes for both development and the operation of the LAT as well as scientific data analysis. These include NASA and the Department of Energy in the United States; CEA/Institut de Recherches sur les lois Fondamentales de l’Univers and l'Institut National de Physique Nucléaire et de Physique des Particules/CNRS in France; the Agenzia Spaziale Italiana and Istituto Nazionale di Fisica Nucleare in Italy; the Ministry of Education, Culture, Sports, Science and Technology, National Laboratory for High Energy Physics (KEK), and Japan Aerospace Exploration Agency in Japan; and the K. A. Wallenberg Foundation, Swedish Research Council and National Space Board in Sweden. Additional support from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’Etudes Spatiales in France for science analysis during the operations phase is also gratefully acknowledged. J.C. is a Royal Swedish Academy of Sciences Research Fellow, funded by a grant from the K. A. Wallenberg Foundation. G.D. and A.B.H. are funded by contract ERC-StG-200911 from the European Community.|
|Official Citation:||Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3 The Fermi LAT Collaboration (11 December 2009) Science 326 (5959), 1512. [DOI: 10.1126/science.1182174] Gamma-ray emission from the jet of an accreting binary star system is correlated with the jet’s radio emission.|
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|Deposited By:||Jason Perez|
|Deposited On:||10 Feb 2010 22:51|
|Last Modified:||26 Dec 2012 11:44|
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