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SuperAGILE detects IGR J16318-4848 in a bright state at hard X-rays

ATel #1713; L. Pacciani, M. Feroci, E. Del Monte, Y. Evangelista, I. Donnarumma, F. Lazzarotto, P. Soffitta, E. Costa, I. Lapshov, M. Rapisarda, M. Tavani, G. Pucella, F. D'Ammando, V. Vittorini, A. Argan, A. Trois (INAF/IASF Rome), A. Giuliani, S. Vercellone, A. Chen, S. Mereghetti, A. Pellizzoni, F. Perotti, F. Fornari, P. Caraveo (INAF/IASF Milan), A. Bulgarelli, F. Gianotti, M. Trifoglio, G. Di Cocco, C. Labanti, F. Fuschino, M. Marisaldi, M. Galli, (INAF/IASF Bologna), 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), and C. Pittori, F. Verrecchia, B. Preger, P. Santolamazza, S. Colafrancesco, P. Giommi (ASDC) and L. Salotti (ASI)
on 10 Sep 2008; 20:20 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: Marco Feroci (marco.feroci@iasf-roma.inaf.it)

Subjects: X-ray, Request for Observations, Binary, Transient

The AGILE mission started today (2008, Sept. 10, satellite maneuver started at 12:00pm) a 1-month pointing towards the Galactic Center region. The first data taken by SuperAGILE showed the Compton-thick X-ray binary IGR J16318-4848 (Walter et al. 2003, A&A 411, L427) in a bright state. The average 20-60 keV flux measured by SuperAGILE is about 300 mCrab, that turns out to be 10 times larger than its average 20-40 keV flux level of 25 mCrab, as reported in the 3rd INTEGRAL/ISGRI catalog (Bird et al. 2007, ApJS 170, 175). A preliminary analysis of the SuperAGILE data shows an increasing trend of the hard X-ray flux. AGILE will continue to monitor the Galactic Center region until 2008, October 10.