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SuperAGILE detects an X-ray burst from the Millisecond Pulsar SAX J1808.4-3658

ATel #1732; E. Del Monte, Y. Evangelista, M. Feroci, I. Donnarumma, F. Lazzarotto, L. Pacciani, 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 23 Sep 2008; 20:04 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

Referred to by ATel #: 1748

On 2008 September 23, 16:59:40 UT SuperAGILE detected and localized a bright X-ray burst, approximately 15 s long. The event is clearly detected only at energies below about 25 keV. The reconstructed position is RA=272.0930 and Dec=-36.9624, with an error radius of 3 arcmin. This position lies only 1.4 arcmin from the millisecond pulsar SAX J1808.4-3658. This source was recently reported by RXTE/PCA (Markwardt and Swank, ATel #1728) to have entered a new period of activity. SuperAGILE thus confirms the new outburst from SAX J1808.4-3658 and detects its renewed bursting activity.