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A new gamma-ray transient, AGL J1608-5253, detected by AGILE in the Galactic Plane

ATel #6427; F. Verrecchia (ASDC and INAF/OAR), G. Piano (INAF/IAPS), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), C. Pittori (ASDC and INAF/OAR), A. Bulgarelli, V. Fioretti (INAF/IASF-Bo), F. Lucarelli (ASDC and INAF/OAR), E. Striani (CIFS and INAF/IAPS), S. Vercellone (INAF/IASF-Pa), I. Donnarumma (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, A. Trois (INAF/OA-Cagliari), M. Pilia (ASTRON, the Netherlands), 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), P. Giommi (ASDC), L. Salotti, and G. Valentini (ASI)
on 28 Aug 2014; 17:51 UT
Credential Certification: Francesco Verrecchia (francesco.verrecchia@asdc.asi.it)

Subjects: Gamma Ray, >GeV, Transient

Referred to by ATel #: 6428, 6462

AGILE is detecting transient gamma-ray emission above 100 MeV from a new unidentified source in the Galactic plane, AGL J1608-5253, with Galactic coordinates (l, b) = (330.15,-0.75) +/- 0.4 deg (95% stat. c.l.) +/- 0.1 deg (syst.), (R.A.: 242.12, Dec: -52.88).

Integrating from 2014-08-21 03:00 UT to 2014-08-27 03:00 UT, a multi-source maximum likelihood analysis yields a source detection at a significance level of about 5 sigma and a flux F=(2.1+/-0.6) x 10E-6 ph/cm2/s (E > 100 MeV).

This is a significant detection for transient gamma-ray emission in the Galactic plane observed by AGILE in spinning mode.

AGILE is currently observing a large portion of the sky in spinning mode. The gamma-ray sky accessible by AGILE can be viewed with the "AGILEScience" App.

Multifrequency observations of AGL J1608-5253 error circle are strongly encouraged.