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AGILE detection of a high Galactic latitude gamma-ray source

ATel #3862; M. Cardillo (INAF/IASF-Rm and Univ. Tor Vergata), F. Verrecchia (ASDC), A. Bulgarelli (INAF/IASF-Bo), C. Pittori (ASDC), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), E. Striani (Univ. Roma Tor Vergata), G. Piano (INAF/IASF-Rm), F. Lucarelli (ASDC), I. Donnarumma (INAF/IASF-Rm), S. Vercellone (INAF/IASF-Pa), F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), F. D'Ammando (INAF/IASF-Pa), E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, G. Pucella, S. Sabatini, A. Trois, V. Vittorini (INAF/IASF-Rm), F. Fuschino, M. Galli, C. Labanti, M. Marisaldi, G. Di Cocco (INAF/IASF-Bo), A. Pellizzoni, M. Pilia (INAF/OA-Cagliari), G. Barbiellini, F. Longo, E. Moretti, E. Vallazza (INFN Trieste), A. Morselli, P. Picozza, (INFN and Univ. Roma Tor Vergata), M. Prest(Universita` dell'Insubria), P. Lipari, D. Zanello (INFN and Univ. Roma Sapienza), P. W. Cattaneo, A. Rappoldi (INFN Pavia), C. Pittori (ASDC), P. Santolamazza, P. Giommi (ASDC), L. Salotti, and G. Valentini (ASI)
on 12 Jan 2012; 19:32 UT
Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it)

Subjects: Gamma Ray, Transient

AGILE detected gamma-ray emission above 100 MeV from a source at Galactic coordinates (l,b) = (81.6 39.1)+/-0.7 deg (95% stat.) +/- 0.1 deg (sist.) (R.A.,Dec.=252.9, 53.7 deg, J2000). Integrating from 2012-01-09 11:26 UT until 2012-01-11 10:57 UT, a maximum likelihood analysis yields a detection at a significance level larger than 5 sigma and a flux F = (280 +/- 90) E-08 ph/cm2/s (E > 100 MeV). There is evidence that the most of the emission is for E<400 MeV.

Just outside our error box there are two sources: the Fermi-LAT source 2FGL J1649.6+5238 and the FSRQ BZQ J1656+5321.

Multifrequency observations of this region are strongly encouraged.

This measurement was obtained by AGILE observing a large portion of the sky in spinning mode.