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AGILE detects enhanced gamma-ray emission from the blazar PKS 2142-758

ATel #2551; F. Verrecchia (ASDC), E. Striani (Univ. Roma Tor Vergata), C. Pittori, F. Lucarelli (ASDC), S. Vercellone (INAF/IASF-Pa), M. Tavani (INAF/IASF-Rm), A. Bulgarelli (INAF/IASF-Bo), F. D'Ammando (INAF/IASF-Pa), I. Donnarumma (INAF/IASF-Rm), V. Vittorini, 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 (INAF/IASF-Rm), F. Fuschino, M. Galli, F. Gianotti, C. Labanti, M. Marisaldi, M. Trifoglio, G. Di Cocco (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), 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 (ASI)
on 13 Apr 2010; 14:50 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Francesco Verrecchia (francesco.verrecchia@asdc.asi.it)

Subjects: Gamma Ray, >GeV, Request for Observations, AGN, Quasar

Referred to by ATel #: 6157

AGILE has been detecting during the last 2 days an increasing gamma-ray flux above 100 MeV from a source positionally consistent with the blazar PKS 2142-758 (RA: 326.803, Dec: -75.603).

Integrating from 2010-04-10 11:30 UT to 2010-04-12 21:00 UT, a quick-look maximum likelihood analysis yields a detection at a significance level of about 5 sigma and a source flux F=(2.6 +/- 0.9) x 10-6 ph/cm2/sec (E > 100 MeV).

The AGILE-GRID detection was obtained while AGILE is observing in spinning mode, surveying a large fraction of the sky each day.

Multifrequency observations of the source are strongly encouraged.