AGILE gamma-ray detection of a variable source in the Musca region
ATel #1394; C. Pittori, F. Verrecchia, P. Santolamazza, B. Preger, P. Giommi (ASDC), S. Vercellone, A. Chen, A. Giuliani, S. Mereghetti, A. Pellizzoni, F. Perotti, F. Fornari, M. Fiorini, P. Caraveo, A. Zambra (INAF/IASF Milano), A. Bulgarelli, F. Gianotti, M. Trifoglio, G. Di Cocco, C. Labanti, F. Fuschino, M. Marisaldi, M. Galli, (INAF/IASF Bologna), M. Tavani, G. Pucella, F. D'Ammando, V. Vittorini, E. Costa, M. Feroci, I. Donnarumma, L. Pacciani, E. Del Monte, F. Lazzarotto, P. Soffitta, Y. Evangelista, I. Lapshov, M. Rapisarda, A. Argan, A. Trois , G. De Paris (INAF/IASF Roma), G. Barbiellini, F. Longo (INFN Trieste), P. Picozza, A. Morselli (INFN Roma-2), M. Prest, E. Vallazza (Universita` dell'Insubria), P. Lipari, D. Zanello (INFN Roma-1), F. Mauri (INFN Pavia) and L. Salotti (ASI)
on 22 Feb 2008; 17:13 UT
Credential Certification: Stefano Vercellone (stefano@iasf-milano.inaf.it)
Subjects: X-ray, Gamma Ray, Transient
The AGILE satellite, currently in a Cycle-1 pointing centered approximately
in the Musca region, during the observing period that started on
2008-02-14 12:00 UT, detected significant and variable gamma-ray emission
from the Galactic plane from a source positionally consistent
with 3EG J1410-6147.
The AGILE Quicklook Analysis (AQA) provides the source positional error box
that is centered at Galactic coordinates l = 312.2 deg, b = -0.3 deg,
and has a AQA radius of about 0.5 degree.
A preliminary maximum likelihood analysis of the AGILE-GRID (Gamma-Ray
Imaging Detector) data obtained between 2008-02-21 06:00 UT and
2008-02-22 07:30 UT for photon energies above 100 MeV results in a detection
significance of about 4 sigma.
A preliminary analysis of the Super-AGILE data over the same time period
and the same sky region does not show any counterpart in the 20-60 keV
energy range. The 3-sigma upper limit on the one-day average flux is 25
mCrab.
We strongly encourage multi-frequency observations of the field of the
gamma-ray source detected by AGILE in an active gamma-ray flaring state.
