GRB 050814: Swift detection of a burst
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 3799
SUBJECT: GRB 050814: Swift detection of a burst
DATE: 05/08/14 12:35:37 GMT
FROM: David Burrows at PSU/Swift dxb15@psu.edu
A. Retter (PSU), L. Barbier (GSFC), S. Barthelmy (GSFC), A. Blustin (UCL-MSSL), D. Burrows (PSU), C. Markwardt (GSFC/UMD), F. Marshall (GSFC), D. Morris (PSU), D. Palmer (LANL), J. Racusin (PSU), P. Roming (PSU), and N. Gehrels (GSFC) report on behalf of the Swift team:
At 11:38:57 UT, Swift-BAT triggered and located GRB050814 (trigger=150314). The BAT on-board calculated location is RA,Dec 264.204,+46.333, {+17h 36m 49s, +46d 19′ 58″} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). There is a single peak with an approximate duration of 25 sec FWHM. The peak rate is approx 800 ct/s in the 15-350 keV band. We note that no BAT Position Notice was distributed through the GCN for this burst.
The S/C slewed immediately and the XRT began taking data at 11:41:15, 138 s after the BAT trigger. The XRT on-board centroid algorithm did not converge and no prompt position is available. However, the lightcurve shows a bright, decaying source in the field of view, and the spectrum looks like a GRB. We are waiting for down-linked data to determine a position.
The UVOT began observing at 11:41:43.9 UT, 167 s after the BAT trigger. In a 100 s V-band image, no new source is detected with respect to the DSS image down to a 5 sigma upper limit of 18.0 mag.
