The Astronomer's Telegram
Telegram Index | Search
To The Parent Site

[ Previous | Next ]


AGILE detection of continued gamma-ray activity of the blazar 3C 454.3

ATEL # 1634; C. Pittori, F. Verrecchia (ASDC), S. Vercellone (INAF/IASF Milan), F. D'Ammando (INAF/IASF Rome), M. Marisaldi (INAF/IASF Bologna), A. Chen, A. Giuliani, S. Mereghetti, A. Pellizzoni, F. Perotti, F. Fornari, M. Fiorini, P. Caraveo, A. Zambra (INAF/IASF Milan), A. Bulgarelli, G. Di Cocco, F. Fuschino, M. Galli, F. Gianotti, C. Labanti, M. Trifoglio (INAF/IASF Bologna), A. Argan, E. Costa, E. Del Monte, G. De Paris, I. Donnarumma, Y. Evangelista, M. Feroci, I. Lapshov, F. Lazzarotto, L. Pacciani, G. Piano, G. Pucella, M. Rapisarda, P. Soffitta, M. Tavani, A. Trois, V. Vittorini (INAF/IASF Rome), G. Barbiellini, F. Longo, E. Vallazza (INFN Trieste), P. Picozza, A. Morselli (INFN Roma-2), M. Prest, (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN Roma-1), F. Boffelli, P. Cattaneo (INFN Pavia), P.Santolamazza, B. Preger, S. Colafrancesco, P. Giommi (ASDC) and L. Salotti (ASI)
on 28 Jul 2008; 14:27 UT
Password Certification: Carlotta Pittori (carlotta.pittori@asdc.asi.it)

Subjects: Gamma Ray, >GeV, AGN, Quasars

AGILE detection of continued gamma-ray activity of the blazar 3C 454.3 During a dedicated Target of Opportunity repointing, triggered by the GLAST-LAT detection of 3C 454.3 above 100 MeV (ATEL #1628), the AGILE Gamma Ray Imaging Detector (GRID) detected 3C 454.3 in high state in the period between 2008-07-25 18:00 UT and 2008-07-28 03:00 UT.

A preliminary maximum likelihood analysis shows a detection at a significance level above 5 sigma, with a source flux in excess of about 200e-8 ph/cm2/s for E>100 MeV.

The AGILE monitoring of the source will continue till 2008-07-31 12:00 UT. We strongly encourage multi-frequency observations of 3C 454.3 during this gamma-ray high-state monitored by AGILE and GLAST.


[ Telegram Index ]

R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates