TITLE: GCN CIRCULAR NUMBER: 7721 SUBJECT: GRB 080515: Swift detection of a burst DATE: 08/05/15 06:19:28 GMT FROM: David Palmer at LANL S. T. Holland (CRESST/USRA/GSFC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), E. A. Hoversten (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 06:01:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080515 (trigger=311658). Swift could not slew to the burst due to Sun constraint. The BAT on-board calculated location is RA, Dec 3.150, +32.599 which is RA(J2000) = 00h 12m 36s Dec(J2000) = +32d 35' 57" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve from TDRSS was truncated by the beginning of a Malindi downlink and is further complicated as we were coming out of the SAA at the time, but shows activity from the trigger time to the end of available data at T+8s, with a peak count rate of ~500 counts/s (15-350 keV). This burst is only 45.9 degrees from the Sun, so there will be no prompt XRT or UVOT data. The field will be outside the Swift Sun observing constraint tomorrow. Burst Advocate for this burst is S. T. Holland (sholland AT milkyway.gsfc.nasa.gov). 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.)