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A new gamma-ray transient, AGL J1835-6040, detected by AGILE

ATel #8866; C. Pittori, F. Verrecchia, F. Lucarelli (ASDC and INAF/OAR), A. Bulgarelli, V. Fioretti, A. Zoli (INAF/IASF-Bo), M. Tavani (INAF/IAPS, and Univ. Roma Tor Vergata), S. Vercellone (INAF/IASF-Pa), G. Piano (INAF/IAPS), E. Striani (CIFS and INAF/IAPS), 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, 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), A. Antonelli (ASDC and INAF/OAR), P. Giommi (ASDC), L. Salotti, G. Valentini, and F. D'Amico (ASI)
on 25 Mar 2016; 15:23 UT
Credential Certification: Carlotta Pittori (carlotta.pittori@asdc.asi.it)

Subjects: Gamma Ray, >GeV, AGN, Blazar, Quasar, Transient

The AGILE satellite is detecting transient gamma-ray emission above 100 MeV from an unidentified source, AGL J1835-6040, with Galactic coordinates (l,b)=(334.6,-21.5) +/- 0.7 deg (95% stat. c.l.) +/- 0.1 deg (syst.), (R.A.: 278.77, Dec: -60.68).

Integrating from 2016-03-23 03:00 UT to 2016-03-25 03:00 UT, a preliminary maximum likelihood analysis yields the detection of the source with a flux of (2.6+/-0.9)x 10E-6 ph/cm2/s (E > 100 MeV) at a significance above 5 sigma.

The AGILE error region contains both the blazar 5BZB J1834-5948, and the Fermi-LAT gamma-ray source 3FGL J1838.5-6006 (active galaxy of uncertain type). This measurement was obtained with AGILE observing a large portion of the sky in spinning mode. Multifrequency observations of the source are strongly encouraged.