TITLE: GCN CIRCULAR NUMBER: 7978 SUBJECT: GRB 080714: Swift detection of a burst DATE: 08/07/14 18:11:28 GMT FROM: David Palmer at LANL M. Perri (ASDC), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), D. M. Palmer (LANL), D. Perez (U Leicester), B. Preger (ASDC), P. Schady (MSSL-UCL), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), G. Stratta (ASDC), M. C. Stroh (PSU), D. E. Vanden Berk (PSU) and L. Vetere (PSU) report on behalf of the Swift Team: At 17:52:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080714 (trigger=316910). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 188.109, -60.279 which is RA(J2000) = 12h 32m 26s Dec(J2000) = -60d 16' 42" 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 40 sec. The peak count rate was ~5000 counts/sec (15-350 keV), at ~1 sec after the trigger. The XRT began observing the field at 17:54:16.4 UT, 79.7 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 188.10733, -60.27708 which is equivalent to: RA(J2000) = 12h 32m 25.76s Dec(J2000) = -60d 16' 37.5" with an uncertainty of 3.1 arcseconds (radius, 90% containment). This location is 7.5 arcseconds from the BAT onboard position, within the BAT error circle. A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 5.44e+21 cm^-2 (Kalberla et al. 2005). The initial flux in the 2.5 s image was 5.01e-10 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 89 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the sub-image. No correction has been made for the large, but uncertain extinction expected. Burst Advocate for this burst is M. Perri (perri AT asdc.asi.it). 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.)