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AGILE detects enhanced gamma-ray emission from a new unidentified source AGL 2302-3251

ATel #3357; F. Lucarelli (ASDC), G. Piano (INAF/IASF-Rm), F. Verrecchia, C. Pittori (ASDC), M. Tavani (INAF/IASF-Rm and Univ. Tor Vergata), A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), F. D'Ammando, S. Vercellone (INAF/IASF-Pa), I. Donnarumma, E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, G. Pucella, S. Sabatini, A. Trois, V. Vittorini (INAF/IASF-Rm), F. Fuschino, M. Galli, C. Labanti, M. Marisaldi, G. Di Cocco (INAF/IASF-Bo), A. Pellizzoni, M. Pilia (INAF/OA-Cagliari), G. Barbiellini, F. Longo, E. Vallazza (INFN Trieste), E. Striani (Univ. Roma Tor Vergata), A. Morselli, P. Picozza (INFN and Univ. Roma Tor Vergata), M. Prest (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN and Univ. Roma Sapienza), P. W. Cattaneo, A. Rappoldi (INFN Pavia), P. Santolamazza, P. Giommi (ASDC), L. Salotti, G. Valentini (ASI)
on 17 May 2011; 18:58 UT
Credential Certification: Fabrizio Lucarelli (fabrizio.lucarelli@asdc.asi.it)

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

AGILE is detecting intense gamma-ray emission above 100 MeV at Galactic coordinates (l, b) = (12.7, -65.6) +/- 1.0 deg (95% stat.) +/- 0.1 deg (syst.) (R.A.,Dec.=(345.38, -32.85)deg, J2000).

Integrating from 2011-05-14 03:00 UT to 2011-05-17 03:00 UT, a maximum likelihood analysis yields a detection at a significance level larger than 5 sigma and a flux above 200 x 10E-8 ph/cm2/s (E > 100 MeV). There is evidence that most part of the emission is below 400MeV.

No prominent extragalactic or Galactic sources are known within the AGL 2302-3251 error box.

This measurement was obtained with AGILE observing a large portion of the sky in spinning mode.

Multifrequency observations of the AGL 2302-3251 error circle are strongly encouraged.