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AGILE observations of gamma-ray emission from the blazar PKS B1424-418

ATel #11222; A. Ursi, M. Cardillo (INAF/IAPS), C. Pittori (SSDC and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), F. Verrecchia, F. Lucarelli (SSDC and INAF/OAR), S. Vercellone (INAF/OA-Brera), A. Bulgarelli (INAF/IASF-Bo), N. Parmiggiani (INAF/IASF-Bo), G. Piano (INAF/IAPS), V. Fioretti, N. Parmiggiani (INAF/IASF-Bo), M. Pilia (INAF/OA-Cagliari), I. Donnarumma (ASI), F. Gianotti, M. Trifoglio (INAF/IASF-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, F. Lazzarotto, I. Lapshov, L. Pacciani, P. Soffitta, S. Sabatini, V. Vittorini (INAF/IAPS), G. Pucella, M. Rapisarda (ENEA-Frascati), G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, (INAF/IASF-Bo), M. Marisaldi (INAF/IASF-Bo and Bergen University), A. Pellizzoni, 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), A. Antonelli (SSDC), S. Colafrancesco (INAF/OAR and Wits University), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 24 Jan 2018; 19:02 UT
Credential Certification: Carlotta Pittori (carlotta.pittori@asdc.asi.it)

Subjects: Gamma Ray, AGN, Transient

Referred to by ATel #: 11235

AGILE is detecting a gamma-ray emission above 100 MeV from a source consistent with the Flat Spectrum Radio Quasar PKS B1424-418 (also known as 3FGL J1427.9-4206 and BZQ J1427-4206) at z=1.52.

For a two-day integration, from 2018-01-22 09:50 UT to 2018-01-24 09:50 UT, a maximum likelihood analysis yields a detection at a significance level above 5 sigma, and a flux F = (2.9 +/- 0.9) x 10-6 ph/cm^2/s (E > 100 MeV).

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 B1424-418 are strongly encouraged.