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AGILE detects enhanced gamma-ray emission from a new unidentified source AGL 2103+5630

ATel #3544; A. Bulgarelli (INAF/IASF-Bo), C. Pittori, F. Verrecchia (ASDC), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen (INAF/IASF-Mi), F. Lucarelli (ASDC), E. Striani (Univ. Roma Tor Vergata), G. Piano (INAF/IASF-Rm), S. Vercellone (INAF/IASF-Pa), I. Donnarumma (INAF/IASF-Rm), A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), 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), A. Morselli, P. Picozza, (INFN and Univ. Roma Tor Vergata), M. Cardillo (INAF/IASF-Rm and Univ. 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 and G. Valentini (ASI)
on 10 Aug 2011; 17:12 UT
Credential Certification: Andrea Bulgarelli (bulgarelli@iasfbo.inaf.it)

Subjects: Gamma Ray, >GeV, Transient

Referred to by ATel #: 3554

AGILE is detecting intense gamma-ray emission above 100 MeV from a source at Galactic coordinates (l,b) = (95.15, 6.49) +/- 0.53 deg (95% stat.) +/- 0.1 deg (syst.) (R.A.,Dec.=315.8, 56.5 deg, J2000).

Integrating from 2011-08-08 04:10 UT to 2011-08-10 09:04 UT, a maximum likelihood analysis yields a detection at a significance level of 4.8 sigma and a flux of (300+/-90) x 10E-8 ph/cm2/s (E > 100 MeV).

Integrating from 2011-07-22 10:46 UT to 2011-08-08 07:25 UT we obtain only a 95% C.L. upper limit of 21 x 10E-8 ph/cm2/s (E > 100 MeV).

No prominent extra-Galactic or Galactic gamma-ray sources are known within the AGL 2103+5630 error box.

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

Multifrequency observations of the AGILE source error circle are strongly encouraged.