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Swift/BAT confirms renewed hard X-ray activity from pulsar SAX J2103.5+4545

ATel #2928; H. A. Krimm (CRESST/GSFC/USRA), S. D. Barthelmy (GSFC), W. Baumgartner (CRESST/GSFC/UMBC), J. Cummings (CRESST/GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), C. B. Markwardt (CRESST/GSFC/UMD), D. Palmer (LANL), T. Sakamoto (CRESTT/GSFC/UMBC), G. Skinner (CRESST/GSFC/UMD), M. Stamatikos (OSU/GSFC), J. Tueller (GSFC), T. Ukwatta (GSFC/GWU)
on 12 Oct 2010; 23:11 UT
Credential Certification: Hans A. Krimm (Hans.Krimm@nasa.gov)

Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar

Referred to by ATel #: 4068

The Swift/BAT hard X-ray transient monitor reports renewed hard X-ray activity in the 15-50 keV band from the Be/X-ray pulsar binary system SAX 2103.5+454. This confirms the X-ray activity predicted for this source by Kiziloglu et al. (ATel #2925). Starting on 2010-Oct-10 (MJD 55479), the source has increased in intensity from an undetectable level (one-sigma upper limit of 0.0007 cts/cm^2/sec or 3 mcrab) up to a level of 0.0073 ± 0.0010 cts/cm^2/sec (30 mcrab) on 2010-Oct-12. This is the first outburst detected for this source since April 2007 (Galis et al., ATel #1063).

BAT Transient Monitor light curve for SAX J2103.5+4545