TITLE: GCN CIRCULAR NUMBER: 8409 SUBJECT: GRB 081025: Burst detection from Swift-BAT slew data DATE: 08/10/26 01:18:16 GMT FROM: Antonio Copete at Harvard U A. Copete, J. Grindlay (Harvard) J. Cummings, S. Barthelmy, C. Markwardt, N. Gehrels (NASA/GSFC) We report the detection of a GRB candidate by the BAT Slew Survey (BATSS) in the slew that started at 08:22:02 UT. The ground-calculated position is RA, Dec = 245.298 +60.466 deg, which is RA (J2000) = 16h 21m 11s Dec(J2000) = +60d 27' 58" with an uncertainty of 2.87 arcmin (90% confidence, including systematic error). The detection was triggered by simultaneous independent detections of 12.9 sigma and 13.7 sigma from imaging in the 15-50 keV and 50-150 keV energy bands, respectively. The burst profile shows a series of 4 main peaks starting at T+63sec, which a measured T90 = 23sec and T50 = 17sec, and the burst leaves the BAT field-of-view at T+120. A follow-up Swift ToO observation has been scheduled to begin on 10/26/08 at 04:58 UT, 20.6 hours after the burst.