TITLE: GCN CIRCULAR NUMBER: 7138 SUBJECT: GRB 071129: Swift detection of a burst DATE: 07/11/29 00:13:36 GMT FROM: Scott Barthelmy at NASA/GSFC C. Pagani (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), F. E. Marshall (NASA/GSFC), J. L. Racusin (PSU), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 00:03:55 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071129 (trigger=297628). Swift did not slew to this burst because of the Sun observing constraint (23deg is less than 45 deg). The BAT on-board calculated location is RA, Dec 220.090, -26.659, which is RA(J2000) = 14h 40m 22s Dec(J2000) = -26d 39' 31" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~5 sec after the trigger. There will be no XRT or UVOT observations of this burst because of the Sun observing constraint. Burst Advocate for this burst is C. Pagani (pagani AT astro.psu.edu). 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.)