TITLE: GCN CIRCULAR NUMBER: 8435 SUBJECT: GRB 081029: Swift detection of a burst DATE: 08/10/29 01:52:55 GMT FROM: David Palmer at LANL T. Sakamoto (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (INAF-OAB), S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (CRESST/GSFC/USRA), J. Mao (INAF-OAB), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 01:43:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 081029 (trigger=332931). Swift could not immediately slew to the burst due to an Earth limb constraint. The BAT on-board calculated location is RA, Dec 346.704, -68.160 which is RA(J2000) = 23h 06m 49s Dec(J2000) = -68d 09' 34" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is usual for an image trigger, the BAT light curve shows nothing remarkable. Due to an observing constraint, Swift will not slew until T0+41.3 minutes. There will be no XRT or UVOT data until that time. Burst Advocate for this burst is T. Sakamoto (Taka.Sakamoto AT 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.)