TITLE: GCN CIRCULAR NUMBER: 8227 SUBJECT: GRB 080915: Swift detection of a burst DATE: 08/09/15 00:14:56 GMT FROM: David Palmer at LANL S. R. Oates (UCL-MSSL), A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 00:02:49 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080915 (trigger=324744). The BAT on-board calculated location is RA, Dec 18.004, -76.014 which is RA(J2000) = 01h 12m 01s Dec(J2000) = -76d 00' 51" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 20 sec. The peak count rate was ~700 counts/sec (15-350 keV), at ~2 sec after the trigger. Due to an observing constraint, Swift will not slew until T0+62.4 minutes. There will be no XRT or UVOT data until this time. Burst Advocate for this burst is S. R. Oates (sro AT mssl.ucl.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)