Swift/BAT Transient Monitor results for Swift J185003.2-005627
ATel #3455; 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 (GSFC), 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 27 Jun 2011; 20:45 UT
Credential Certification: Hans A. Krimm (Hans.Krimm@nasa.gov)
Subjects: X-ray, Neutron Star, Transient
After the announcement of the discovery of the new galactic transient source
Swift J185003.2-005627 (Beardmore et al., GCN 12083; Beardmore et al., ATel
#3454), we examined the archival data of the Swift/BAT hard X-ray transient
monitor for simultaneous and previous detections of the source. The source is
not detected in the daily averages for 2011 June 25 (the day of the discovery)
or any day since (1-sigma upper limit of 0.0007 ct/s/cm2). This means that
although the outburst was bright, the integrated fluence did not reach the
detection level.
However, the source was detected about a month earlier. During the ten-day
period from 2011 May 18-26 (MJD 55699-55708) Swift J185003.2-005627 was seen
consistently at a level above 0.002 ct/s/cm2 (9 mCrab) with an average over the
period of 0.0035 +/- 0.001 ct/s/cm2 (16 mCrab). The peak of this earlier
outburst was 0.014 +/- 0.006 ct/s/cm2 (60 mCrab) on 2011 May 23. All count
rates are in the 15-50 keV band. Searches back to Feb. 2005 show no earlier
such detections of Swift J185003.2-005627.
BAT hard X-ray transient monitor light curve for Swift J185003.2-005627
