TITLE: GCN CIRCULAR NUMBER: 6777 SUBJECT: GRB 070911: Swift detection of a burst DATE: 07/09/11 06:20:20 GMT FROM: David Palmer at LANL H. A. Krimm (GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 05:57:44 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070911 (trigger=290624). Swift automatic slews are currently disabled, as we are currently recovering from a safehold. The BAT on-board calculated location is RA, Dec 25.799, -33.473 which is RA(J2000) = 01h 43m 12s Dec(J2000) = -33d 28' 21" with an uncertainty of 4 arcmin (radius, 90% containment, including systematic uncertainty, however there is an uncalibrated boresight shift due to operations with a different set of gyros than we have used previously). The BAT light curve showed a complex multi-peaked structure with a duration of about 150 sec. The peak count rate was ~8000 counts/sec (15-350 keV), at ~36 sec after the trigger. Because we are in the process of resuming normal operations, there is no automatic follow-up observation by the XRT and UVOT. Burst Advocate for this burst is H. A. Krimm (krimm 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.)