[ Previous | Next | ADS ]

AGILE detects enhanced gamma-ray emission from BZQ J1512-0905 (PKS1510-089)

ATel #3470; I. Donnarumma (INAF/IASF-Rm), F. Lucarelli (ASDC), S. Vercellone (INAF/IASF-Pa), M. Tavani (INAF/IASF-Rm, and Univ. Tor Vergata), A. Bulgarelli, F. Gianotti, M. Trifoglio (INAF/IASF-Bo), A. Chen, A. Giuliani, S. Mereghetti, P. Caraveo, F. Perotti (INAF/IASF-Mi), 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. Cardillo (INAF/IASF-Rm and Univ. Tor Vergata), E. Striani (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), C. Pittori, P. Santolamazza, F. Verrecchia, P. Giommi (ASDC), L. Salotti and G. Valentini (ASI).
on 4 Jul 2011; 11:41 UT
Credential Certification: Fabrizio Lucarelli (fabrizio.lucarelli@asdc.asi.it)

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

Referred to by ATel #: 3473, 3479, 3500, 3509, 3523, 3775, 3799

AGILE is detecting intense gamma-ray emission above 100 MeV from a position consistent with the flat-spectrum radio quasar BZQ J1512-0905 (PKS1510-089) (VLBI coordinates (J2000): RA=15h 12m 50.5s, Dec.=-09d 05m 59.8s (Johnston et al. 1995, AJ, 110, 880)).

Integrating from 2011-07-02 04:30 UT to 2011-07-04 04:30 UT, a maximum likelihood analysis yields a detection at a significance level above 7 sigma and a flux above 7.0 x 10E-6 ph/cm2/s (E>100 MeV).

The flux reported above is consistent with the daily flare detected by Fermi/LAT in April 2009 (ATel #2033) and the flare peak recorded by AGILE in March 2009 (D'Ammando et al. 2011, A&A 529, 145).

A preliminary spectral analysis performed between June 28th and July 4th, 2011, in the energy range 100 MeV-1 GeV, shows that the gamma-ray spectrum is well consistent with the one reported in D'Ammando et al. 2011 (A&A 529, 145) during the AGILE 2009 multi-frequency campaign.

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

Multifrequency observations of BZQ J1512-0905 are strongly encouraged.