AGILE detection of gamma-ray activity from the FSRQ PKS 1830-211
ATel #15649; G. Piano (INAF/IAPS), G. Panebianco (Univ. Bologna - INAF/OAS-Bo), C. Pittori, F. Verrecchia (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Bulgarelli, V. Fioretti, N. Parmiggiani, A. Addis, L. Baroncelli, A. Di Piano (INAF/OAS-Bo), F. Lucarelli (SSDC and INAF/OAR), S. Vercellone (INAF/OA-Brera), M. Cardillo, A. Ursi, C. Casentini (INAF/IAPS), I. Donnarumma (ASI), 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 9 Oct 2022; 10:24 UT
Credential Certification: Giovanni Piano (giovanni.piano@inaf.it)
Subjects: Gamma Ray, >GeV, AGN, Blazar, Gravitational Lensing
The GRID detector onboard the AGILE satellite is detecting ongoing bright gamma-ray activity from the gravitational lensed FSRQ PKS 1830-211 (z = 2.507, Lindman et al. 1999, ApJ, 514, 57). Integrating from 2022-10-06 UT 00:00:00 to 2022-10-09 UT 00:00:00 (MJD 59858.0- 59861.0), a preliminary multi-source likelihood analysis yields a detection with a significance of 6.0 sigma and a gamma-ray flux F(>100 MeV) = (3.2 +/- 0.8) x 10^-6 photons/cm^2/s.
A prolonged and intense gamma-ray activity from the blazar was reported between October 2018 and September 2019 by Fermi-LAT, DAMPE and AGILE (ATel #13065, #13030, #12705, #12685, #12622, #12603, #12601, #12594, #12541, #12252, and #12136).
The AGILE-GRID detection was obtained while AGILE is observing in spinning mode, surveying a large fraction of the sky each day. The source can be monitored with the public mobile application "AGILEScience" developed by the AGILE Team, available for both Android and iOS devices.
