TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5447 SUBJECT: GRB 060814: Swift detection of a bright burst DATE: 06/08/14 23:21:14 GMT FROM: Scott Barthelmy at NASA/GSFC A. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMD), C. Guidorzi (Univ Bicocca&INAF-OAB), K. M. McLean (LANL/UTD), D. M. Palmer (LANL), P. Romano (INAF-OAB), M. Stamatikos (NASA/ORAU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 23:02:19 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 060814 (trigger=224552). Swift slewed immediately to the burst. The BAT on-board calculated location is RA,Dec 221.348, +20.583 {14h 45m 23s, +20d 34' 58"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows at least 3 large peaks. The first peak starts at T-10 sec, peaks at T+16 sec with 12,000 cnts/sec. The second peaks at T+70 sec at 6000 cnts/sec. The third peaks at T+120 sec at ~1000 cnts/sec. The XRT began observing the field at 23:03:30 UT, 72 seconds after the BAT trigger. XRT found a bright variable X-ray source located at RA(J2000) = 14h 45m 21.2s, Dec(J2000) = +20d 35' 02.7", with an estimated uncertainty of 5.0 arcseconds (90% confidence radius). This location is 32 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 0.1s image was 5.7e-08 erg/cm2/s (0.2-10 keV). UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 80 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. The typical 3-sigma upper limit has been about 18.5 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.04.