[ Previous | Next | ADS ]

AGILE confirms high gamma-ray state of GB6 B1310+4844

ATel #2310; A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), S. Vercellone (INAF/IASF-Pa), M. Tavani (INAF/IASF-Rm), E. Striani (Univ. Roma Tor Vergata and INFN Roma), F. Verrecchia, C. Pittori, P. Santolamazza (ASDC), F. D'Ammando (Univ. Roma Tor Vergata and INAF/IASF-Rm), I. Donnarumma (INAF/IASF-Rm), V. Vittorini, E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, G. Piano, G. Pucella, S. Sabatini, A. Trois (INAF/IASF-Rm), F. Fuschino, M. Galli, C. Labanti, M. Marisaldi, G. Di Cocco (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), 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), S. Colafrancesco, P. Giommi,(ASDC), L. Salotti (ASI)
on 23 Nov 2009; 13:04 UT
Credential Certification: Stefano Vercellone (stefano@iasf-milano.inaf.it)

Subjects: Gamma Ray, >GeV, AGN, Quasar

Referred to by ATel #: 2316

The AGILE Gamma-Ray Imaging Detector (GRID) detected significant gamma-ray emission above 100 MeV from a source consistent with the blazar GB6 B1310+4844, recently reported in a high gamma-ray state by Fermi/LAT on Nov. 18 2009 (Sokolovsky et al., ATel #2306).

Integrating from 2009-11-20 17:00 UT to 2009-11-22 17:00 UT, a maximum likelihood analysis shows a detection at a significance level above 4.7 sigma, with a source flux above 100 e-8 ph/cm2/sec (E > 100 MeV), confirming the current high gamma-ray state of the source.

A maximum likelihood analysis from 2009-11-18 17:00 UT to 2009-11-22 17:00 UT shows an AGILE detection at a significance level above 6 sigma.

The AGILE/GRID detection was obtained while AGILE is observing in spinning mode, surveying a large fraction of the sky each day.