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AGILE detection of AGL J2206+6203, a new unidentified gamma-ray source

ATEL # 2403; A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), F. Lucarelli, C. Pittori, F. Verrecchia (ASDC), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), E. Striani (Univ. Roma Tor Vergata and INFN Roma), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), S. Vercellone (INAF/IASF-Pa), I. Donnarumma (INAF/IASF-Rm), F. D'Ammando (Univ. Roma Tor Vergata and INAF/IASF-Rm), E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, G. Piano, 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. Moretti, E. Vallazza (INFN Trieste), 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, S. Colafrancesco, P. Giommi (ASDC) and L. Salotti (ASI)
on 25 Jan 2010; 17:47 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Carlotta Pittori (carlotta.pittori@asdc.asi.it)

Subjects: Gamma Ray, >GeV, Request for Observations, Transients
Referred to by ATEL #: 2405

AGILE is detecting intense gamma-ray emission above 100 MeV from a new unidentified source, AGL J2206+6203, with Galactic coordinates (l, b) = (104.9, 5.1) +/- 0.4 deg (95% stat. c.l.) +/- 0.1 deg (syst.), and Celestial coordinates R.A. (J2000) = 22 06 49.17, Dec. (J2000)= 62 03 45.2.

Integrating from 2010-01-20 03:46 UT to 2010-01-25 11:15 UT, a maximum likelihood analysis yields a detection at a significance level larger than 5 sigma, and a flux F = (160+/-50) 10^-8 ph/cm2/s (E > 100 MeV). AGILE is detecting marginal (3 sigma) emission from this source above above 400 MeV.

No prominent gamma-ray source is known within the error box of AGL J2206+6203.

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

Multifrequency observations of the AGL J2206+6203 error box are strongly encouraged.


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R. E. Rutledge , Editor
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