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AGILE detection of increasing gamma-ray activity from the Blazar 3C 454.3

ATel #9157; F. Lucarelli, C. Pittori, F. Verrecchia (ASDC and INAF/OAR), A. Bulgarelli, V. Fioretti, A. Zoli (INAF/IASF-Bo), G. Piano, P. Munar-Adrover (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), I. Donnarumma (INAF/IAPS), S. Vercellone (INAF/IASF-Pa), E. Striani (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), N. Parmiggiani (University of Modena and Reggio Emilia), 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 15 Jun 2016; 12:53 UT
Credential Certification: Fabrizio Lucarelli (fabrizio.lucarelli@asdc.asi.it)

Subjects: Gamma Ray, >GeV, Blazar, Transient

Referred to by ATel #: 9176, 9178, 9190, 9723

The AGILE satellite is detecting an enhancement of gamma-ray emission above 100 MeV from the FSRQ 3C 454.3.

Integrating from 2016-06-11 01:00 UT to 2016-06-15 01:00 UT, a maximum likelihood analysis yields the detection of the source with a flux of (2.7 +/- 0.7) x 10^-6 ph/cm2/s (E > 100 MeV), at a significance level above 5 sigma.

Integrating over 24 hours from 2016-06-14 00:00 UT, AGILE has detected a peak emission of F=(4.3 +/- 1.5) x 10^-6 ph/cm2/s above 100 MeV.

Recent increase of optical activity from this quasar has been reported in ATel #9150.

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

Multifrequency observations of this source are strongly encouraged.