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A gamma-ray flare from 3C 454.3 detected by AGILE

ATel #9186; P. Munar-Adrover, G. Piano (INAF/IAPS), C. Pittori, F. Verrecchia, F. Lucarelli (ASDC and INAF/OAR), A. Bulgarelli (INAF/IASF-Bo), N. Parmiggiani (University of Modena and Reggio Emilia), V. Fioretti, A. Zoli (INAF/IASF-Bo), S. Vercellone (INAF/IASF-Pa), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), I. Donnarumma (INAF/IAPS), E. Striani, G. Minervini (CIFS and INAF/IAPS), M. Cardillo (INAF/OA-Arcetri and INAF/IAPS), F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), A. Chen (Wits University), A. Argan, E. Costa, E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, I. Lapshov, L. Pacciani, P. Soffitta, S. Sabatini, V. Vittorini (INAF/IAPS), G. Pucella, M. Rapisarda (ENEA-Frascati), G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, M. Marisaldi (INAF/IASF-Bo), A. Pellizzoni, M. Pilia, A. Trois (INAF/OA-Cagliari), G. Barbiellini, E. Vallazza (INFN Trieste), F. Longo (Univ. Trieste and INFN Trieste), A. Morselli, P. Picozza (INFN and Univ. Roma Tor Vergata), M. Prest (Univ. dell'Insubria), P. Lipari, D. Zanello (INFN and Univ. Roma Sapienza), P. W. Cattaneo, A. Rappoldi (INFN Pavia), S. Colafrancesco (INAF/OAR and Wits University), A. Ferrari (Univ. Torino and CIFS), A. Antonelli (ASDC and INAF/OAR), P. Giommi (ASDC), L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 24 Jun 2016; 12:53 UT
Credential Certification: Giovanni Piano (giovanni.piano@iaps.inaf.it)

Subjects: Gamma Ray, >GeV, AGN, Black Hole, Blazar, Transient

Referred to by ATel #: 9190, 9192

The AGILE satellite is detecting a significant enhancement in gamma-ray activity from the FSRQ 3C 454.3 since the recent ATel #9176.

According to a maximum likelihood analysis of the AGILE-GRID data for the integration period between 2016-06-22 02:50:00 UT and 2016-06-24 02:50:00 UT, the flux is F(E > 100 MeV) = (1.2 +/- 0.2) x 10^-5 ph/cm^2/s; this corresponds to a flux increase of approximately a factor of 6 above the average flux during the last 6 days. The current flux level is similar to the gamma-ray activity reported by AGILE in 2014 (ATel #6234).

This measurement was obtained with AGILE observing a large portion of the sky in spinning mode. Multifrequency observations of the source are strongly encouraged. The 3C 454.3 gamma-ray flaring activity can be followed with the APP "AGILEScience".

AGILE-GRID sky map (E > 100 MeV) during the period 22-24 June, 2016