AGILE detection of gamma-ray rebrightening of the blazar PKS 1424-418
ATel #16400; A. Bulgarelli (INAF/OAS-Bo), C. Pittori, F. Verrecchia (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), L. Foffano (INAF/IAPS), G. Panebianco (INAF/OAS-Bo), G. Piano (INAF/IAPS), V. Fioretti, N. Parmiggiani, A. Addis, L. Baroncelli, A. Di Piano, L. Castaldini, A. Ciabattoni (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, 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 11 Jan 2024; 17:24 UT
Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it)
Subjects: Gamma Ray, >GeV, AGN, Blazar, Transient
Referred to by ATel #: 16406
AGILE is currently detecting intense gamma-ray emission above 100 MeV from a region positionally consistent with the blazar PKS 1424-418 (z = 1.522, White et al., ApJ 327 561, 1988). Integrating from 2024-01-09 09:46:07 UT to 2024-01-11 09:46:07 UT, a preliminary maximum likelihood analysis shows a detection at 5.3 sigma, with a flux F = (3.3 +/- 1.1) x 10^-06 ph/cm^2/s (E>100 MeV). The average flux, detected by the AGILE-GRID during the previous 7 days, was F(>100 MeV) = (1.9 +/- 0.7) x 10^-6 photons/cm^2/s.
Previous flares of PKS 1424-418 in gamma-rays were reported by AGILE in ATels #15818, #15533 and #15527.
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.
Multifrequency observations of the PKS 1424-418 region are strongly encouraged.
