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AGILE detection of an unknown gamma-ray source AGL J1412-0522

ATel #10623; G. Piano (INAF/IAPS), F. Verrecchia, C. Pittori (SSDC/ASI and INAF/OAR), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), A. Bulgarelli (INAF/IASF-Bo), F. Lucarelli (SSDC/ASI and INAF/OAR), P. Munar-Adrover, G. Minervini, A. Ursi (INAF/IAPS), S. Vercellone (INAF/OA-Brera), I. Donnarumma (ASI), V. Fioretti, A. Zoli (INAF/IASF-Bo), E. Striani (CIFS and INAF/IAPS), M. Cardillo (INAF/OA-Arcetri and INAF/IAPS), 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, M. Marisaldi (INAF/IASF-Bo), 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), S. Colafrancesco (INAF/OAR and Wits University), N. Parmiggiani (University of Modena and Reggio Emilia), A. Ferrari (Univ. Torino and CIFS), F. Paoletti (East Windsor RSD Hightstown and INAF/IAPS), A. Antonelli (SSDC/ASI), P. Giommi, L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 7 Aug 2017; 16:45 UT
Credential Certification: Giovanni Piano (giovanni.piano@iaps.inaf.it)

Subjects: Gamma Ray, >GeV, Request for Observations, Transient

Referred to by ATel #: 10718

AGILE is detecting intense gamma-ray emission above 100 MeV from an unidentified source, AGL J1412-0522, at Galactic coordinates (l, b)=(336.9, 52.1) +/- 0.4 deg (95% stat. c.l.) +/- 0.1 deg (syst.) (R.A., Dec (J2000): 213.0, -5.4 deg).

Integrating from 2017-08-05 03:00 UT to 2017-08-07 03:00 UT, a preliminary maximum likelihood analysis yields a detection around 5.7 sigma and a flux F(E>100 MeV)=(2.4 +/- 0.7) x 10^-6 ph cm^-2 s^-1. Most of the gamma-ray emission is detected below 400 MeV.

No known gamma-ray source appears within the AGILE error circle.

This measurement was obtained with AGILE observing a large portion of the sky in spinning mode. Multifrequency observations of AGL J1412-0522 are strongly encouraged.