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AGILE detects enhanced gamma-ray emission from a region including the BL Lac Object S4 1749+70

ATel #3199; F. Lucarelli, C. Pittori (ASDC), M. Cardillo (INAF/IASF-Rm and Univ. Tor Vergata), F. Verrecchia (ASDC), E. Striani (Univ. Roma Tor Vergata), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), S. Vercellone (INAF/IASF-Pa), A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), I. Donnarumma (INAF/IASF-Rm), F. D'Ammando (INAF/IASF-Pa), 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), L. Salotti and and G. Valentini (ASI)
on 1 Mar 2011; 15:15 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Fabrizio Lucarelli (fabrizio.lucarelli@asdc.asi.it)

Subjects: >GeV, AGN, Blazar

Referred to by ATel #: 3234, 8245

AGILE is detecting intense gamma-ray emission above 100 MeV at Galactic Coordinates (l, b) = (100.1, 30.7) +/- 0.8 deg (95% stat.) +/- 0.1 deg (syst.) (R.A.=17:49:7.5, Dec.=69:44:4.0, J2000).

Integrating from 2011-02-26 00:00 UT to 2011-03-01 04:00 UT, a maximum likelihood analysis yields a detection at a significance level above 5 sigma and a flux F=(200 +/- 60) x 10E-8 ph/cm2/s (E > 100 MeV).

We note that the BL Lac Object S4 1749+70 (also known as BZB J1748+7005) lies within the AGILE gamma-ray source error box. The measured flux is about a factor of two higher with respect to a previous detection reported in the same region by the Fermi Coll. on February 16, 2011 (ATel #3171).

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

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