AGILE confirmation of the gamma-ray flaring activity from the narrow-line Seyfert1 Galaxy PKS 2004-447
ATel #13244; 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), C. Pittori, F. Lucarelli (SSDC and INAF/OAR), S. Vercellone (INAF/OA-Brera), A. Bulgarelli, F. Gianotti, V. Fioretti, M. Trifoglio (INAF/OAS-Bo), I. Donnarumma (ASI), E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, V. Vittorini (INAF/IAPS), A. Chen (Wits University), A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), 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. Antonelli (INAF/OAR), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI).
on 30 Oct 2019; 19:28 UT
Credential Certification: Francesco Verrecchia (francesco.verrecchia@asdc.asi.it)
Subjects: Gamma Ray, >GeV, AGN
We report the AGILE-GRID detection of gamma-ray flaring emission (E > 100 MeV) from a source positionally consistent with the narrow-line, radio-loud, Seyfert 1 Galaxy PKS 2004-447, with coordinates R.A.= 301.979935 deg, Decl.= -44.578965 deg (J2000), during the period 25-27 October 2019, which includes the time of the GeV flare reported recently by Fermi/LAT from the same source (Atel #13229, A. Gokus et al.).
Integrating from 2019-10-25 00:00 UT to 2019-10-27 08:00 UT, a maximum likelihood analysis yields a detection at a significance level at about 5 sigma with a source flux F = (1.9 +/- 0.6) x 10e-6 ph/cm^2/s (E > 100 MeV). The source is not significantly detected by AGILE-GRID later than October 27th, 2019.
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 PKS 2004-447 are strongly encouraged.
