TITLE: GCN CIRCULAR NUMBER: 19876 SUBJECT: GRB 160827A: Swift detection of a burst DATE: 16/08/27 15:54:29 GMT FROM: Scott Barthelmy at NASA/GSFC K. L. Page (U Leicester) and S. D. Barthelmy (GSFC) report on behalf of the Swift Team: At 15:46:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 160827A (trigger=710050). Swift did not slew due to observing constraint. The BAT on-board calculated location is RA, Dec 179.296, -29.159, which is RA(J2000) = 11h 57m 11s Dec(J2000) = -29d 09' 32" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple overlapping peaks with a duration of about 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~8 sec after the trigger. Due to a Sun observing constraint, Swift cannot slew to the BAT position until 00:09 UT on 2016 November 14. There will thus be no XRT or UVOT data for this trigger before this time. Burst Advocate for this burst is K. L. Page (klp5 AT leicester.ac.uk). 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.)