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AGILE detection of gamma-ray emission from Cygnus X-3

ATel #2645; A. Bulgarelli (INAF/IASF Bologna), M. Tavani (INAF/IASF Roma), F. Gianotti, M. Trifoglio (INAF/IASF Bologna), E. Striani (Univ. Tor Vergata), C. Pittori, F. Verrecchia (ASDC), S. Sabatini, G. Piano (INAF/IASF Roma), A. Argan, A. Trois, G. De Paris, V. Vittorini, E. Costa, I. Donnarumma, M. Feroci, L. Pacciani, E. Del Monte, F. Lazzarotto, P. Soffitta, Y. Evangelista, I. Lapshov (INAF-IASF-Rm), A. Chen, A. Giuliani (INAF-IASF-Milano), M. Marisaldi, G. Di Cocco, C. Labanti, F. Fuschino, M. Galli (INAF/IASF Bologna), P. Caraveo, S. Mereghetti, F. Perotti (INAF/IASF Milano), G. Pucella, M. Rapisarda (ENEA-Roma), A. Pellizzoni, M. Pilia (INAF/OA-Cagliari), G. Barbiellini, F. Longo (INFN Trieste), P. Picozza, A. Morselli (INFN and Univ. Tor Vergata), M. Prest (Universita` dell'Insubria), Verrecchia (ASDC), S. Sabatini, G. Piano (INAF/IASF Roma), F. D'Ammando, S. Vercellone (INAF/IASF-Palermo), P. Lipari, D. Zanello (INFN Roma-1), P. W. Cattaneo, A. Rappoldi (INFN Pavia), P. Giommi, P. Santolamazza, F. Lucarelli, S. Colafrancesco, (ASDC), L. Salotti (ASI)
on 27 May 2010; 20:13 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Marco Tavani (tavani@iasf-roma.inaf.it)

Subjects: Gamma Ray, Black Hole, Neutron Star, Transient

Referred to by ATel #: 3141, 3325, 8591

AGILE is currently detecting excess gamma-ray flux above 100 MeV from the microquasar Cygnus X-3.

A quicklook analysis of gamma-ray data shows significant flux from a source positionally consistent with Cygnus X-3 during the period 2010-05-25 UT 19:10 to 2010-05-27 UT 17:04.

Multifrequency observations of Cygnus X-3 are strongly encouraged.