AGILE detection of intense gamma-ray emission from the region of the FSRQ PKS 0035-252
ATel #12763; G. Piano, M. Cardillo (INAF/IAPS), M. Tavani (INAF/IAPS and Univ. Roma Tor Vergata), C. Pittori, F. Verrecchia, F. Lucarelli (SSDC and INAF/OAR), A. Ursi, C. Casentini (INAF/IAPS), A. Bulgarelli, N. Parmiggiani, V. Fioretti (INAF/OAS-Bo), I. Donnarumma (ASI), S. Vercellone (INAF/OA-Brera), 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. Pacciani, P. Soffitta, V. Vittorini (INAF/IAPS), 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, 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), 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 15 May 2019; 15:08 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Giovanni Piano (giovanni.piano@iaps.inaf.it)
Subjects: Gamma Ray, >GeV, AGN, Blazar, Quasar, Transient
AGILE is detecting enhanced gamma-ray emission from a source at Galactic coordinates (l, b) = (72.0, -86.1) +/- 0.9 deg (stat., 95% C.L.) +/- 0.1 deg (syst.), positionally consistent with the flat spectrum radio quasar PKS 0035-252 (z = 0.49806, Jones et al. 2009, MNRAS, 399, 683), also known as 5BZQ J0038-2459, associated with the gamma-ray source 3FGL J0038.0-2501.
Integrating from 2019-05-13 UT 10:00:00 to 2019-05-15 UT 10:00:00, a preliminary maximum likelihood analysis yields a detection with a significance above 5 sigma and a flux F(E > 100 MeV) = (2.6 +/- 0.8) x 10^-6 ph/cm^2/s.
Flaring activity from this source has been reported in gamma-ray, X-ray and optical band between November 2017 and July 2018 (ATel #10951, #11854, #11874).
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 PKS 0035-252 are strongly encouraged.
