NASA Swift-BAT detection of GRB 050507

TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 3378
SUBJECT: Swift-BAT detection of GRB 050507
DATE: 05/05/07 23:35:07 GMT
FROM: Andrew Levan at U.of Leicester

A. Levan (Leicester), L Barbier (GSFC), A. Blustin (MSSL), C. Markwardt (GSFC), D. Palmer (LANL) on behalf of the Swift team.

At 22:43:18 UT, the Swift Burst Alert Telescope (BAT) triggered and located on-board GRB050507 (trigger #118248). The BAT on-board calculated location is RA, dec 48.055,-11.073 (J2000) with an uncertainty of 4 arcmin (radius, 3-sigma, including estimated systematic uncertainty). The BAT light curve showed a spikey burst structure with a duration of about 20 seconds. The peak count rate measured by BAT was about 800 counts/sec in the 15 – 350 keV band.

Because this burst is only 28 degrees from the sun, the spacecraft will not slew to this burst.