TITLE: GCN CIRCULAR NUMBER: 6882 SUBJECT: GRB 071011: Swift detection of a burst DATE: 07/10/11 12:51:21 GMT FROM: Scott Barthelmy at NASA/GSFC F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), O. Godet (U Leicester), S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 12:40:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071011 (trigger=293924). Swift did not execute an immediate slew because of an Earth-observing constraint, but it will at ~T+2700 sec. The BAT on-board calculated location is RA, Dec 8.400, +61.072 which is RA(J2000) = 00h 33m 36s Dec(J2000) = +61d 04' 21" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two peaks each of ~10 sec duration. The second peak is at ~T+48 sec. The peak count rate was ~1800 counts/sec (15-350 keV), at ~1 sec after the trigger. Because of an Earth limb constraint, the spacecraft did not slew promptly to the BAT position, and so there are no immediate XRT data products to analyze. The UVOT is currently in safe and will not observe this burst. Burst Advocate for this burst is F. E. Marshall (marshall 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.)