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AGILE detection of increasing gamma-ray emission from the FSRQ PKS1510-089

ATel #3934; F. Lucarelli (ASDC), G. Piano (INAF/IASF-Rm), F. Verrecchia (ASDC), E. Striani (Univ. Roma Tor Vergata), M. Cardillo (INAF/IASF-Rm and Univ. Tor Vergata), I. Donnarumma (INAF/IASF-Rm), S. Vercellone (INAF/IASF-Pa), M. Tavani (INAF/IASF-Rm and Univ. Tor Vergata), C. Pittori (ASDC), A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), S. Colafrancesco (INAF/OAR and Wits University), G. Pucella (ENEA), E. Del Monte, Y. Evangelista, M. Feroci, F. Lazzarotto, L. Pacciani, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, A. Argan, 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, E. Vallazza (INFN Trieste), F. Longo (Univ. Trieste and INFN Trieste), A. Morselli, P. Picozza (INFN and Univ. Roma Tor Vergata), M. Prest (Univ. 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 17 Feb 2012; 15:16 UT
Credential Certification: Fabrizio Lucarelli (fabrizio.lucarelli@asdc.asi.it)

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

Referred to by ATel #: 3939

AGILE is detecting intense gamma-ray emission above 100 MeV from a source whose position is consistent with the flat spectrum radio quasar PKS 1510-089 (also known as BZQ J1512-0905; coordinates: R.A. = 15h 12m 50.5s, Dec. =-09d 05m 59.8s, J2000).

Integrating from 2012-02-14 04:00 UT to 2012-02-17 04:30 UT, a maximum likelihood analysis yields a detection at a significance level of 7.3 sigma and a flux of (380+/-90) x 10E-8 ph/cm2/s (E > 100 MeV).

An integration of about 24h, from 2012-02-16 02:00 UT to 2012-02-17 03:30 UT, yields a detection of 6.7 sigma and a flux of (610+/-170) x 10E-8 ph/cm2/s (E > 100 MeV). The gamma-ray flux of the source is currently increasing.

A previous increase of the gamma-ray flux has been recently reported by AGILE (ATel #3907), followed by a Swift ToO observation (ATel #3910).

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

Multifrequency observations of the blazar PKS 1510-089 are strongly encouraged.