TITLE: GCN CIRCULAR NUMBER: 8361 SUBJECT: GRB 081012: Swift detection of a burst DATE: 08/10/12 13:19:01 GMT FROM: David Palmer at LANL M. C. Stroh (PSU), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), P. A. Evans (U Leicester), D. Grupe (PSU), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), D. M. Palmer (LANL), D. Perez (U Leicester), J. L. Racusin (PSU), T. Sakamoto (NASA/UMBC), T. N. Ukwatta (GSFC/GWU), L. Vetere (PSU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 13:10:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 081012 (trigger=331475). Swift did not immediately slew due to the Earth limb constraint. The BAT on-board calculated location is RA, Dec 30.217, -17.641 which is RA(J2000) = 02h 00m 52s Dec(J2000) = -17d 38' 28" 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 ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger. Due to an observing constraint, Swift will not slew until T0+49.2 minutes. There will be no XRT or UVOT data until this time. Burst Advocate for this burst is M. C. Stroh (stroh AT astroh.org). 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.)