AGILE confirmation of the gamma-ray flaring activity from the FSRQ 3C 345
ATel #15314; F. Verrecchia (SSDC and INAF/OAR), G. Piano (INAF/IAPS), M. Tavani (INAF/IAPS and Univ. Roma Tor Vergata), M. Cardillo, C. Casentini, A. Ursi (INAF/IAPS), S. Vercellone (INAF/OA-Brera), C. Pittori, F. Lucarelli (SSDC and INAF/OAR), A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/OAS-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, L. Foffano, I. Lapshov, E. Menegoni, L. Pacciani, P. Soffitta, V. Vittorini (INAF/IAPS), F. Lazzarotto (INAF/OAPD), G. Di Cocco, F. Fuschino, M. Galli, C. Labanti (INAF/OAS-Bo), M. Marisaldi (University of Bergen), A. Pellizzoni, M. Pilia, A. Trois (INAF/OA-Cagliari), G. Barbiellini (INFN Trieste), F. Longo (Univ. Trieste and INFN Trieste), E. Vallazza (INFN Milano Bicocca), 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), A. Ferrari (Univ. Torino and CIFS), F. Paoletti (East Windsor RSD Hightstown and INAF/IAPS), L. A. Antonelli (INAF/OAR), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 6 Apr 2022; 15:12 UT
Credential Certification: Francesco Verrecchia (francesco.verrecchia@asdc.asi.it)
Subjects: Gamma Ray, >GeV, AGN, Blazar, Transient
We report the AGILE-GRID detection of gamma-ray flaring emission (E > 100 MeV) from
a source positionally consistent with the FSRQ 3C 345, with coordinates
R.A.= 250.745041 deg, Decl.= 39.810276 deg (J2000),
during the period 03-06 April 2022, which includes the time of the GeV
flare recently reported by Fermi/LAT from the same source (Atel #15313, F. Giacchino et al.).
Integrating from 2022-04-03 00:00 UT to 2022-04-06 00:00 UT, a maximum likelihood
analysis yields a detection at 5 sigma significance level with a source flux
F = (2.2 +/- 0.8) x 10e-6 ph/cm^2/s (E > 100 MeV). The source is not included
in any AGILE-GRID catalog.
This measurement was obtained with AGILE observing a large portion of the sky in spinning mode.
The source can be monitored with the public mobile application "AGILEScience" developed
by the AGILE Team, available for both Android and iOS devices.
Multifrequency follow-up observations of 3C 345 are strongly encouraged.
