TITLE: GCN CIRCULAR NUMBER: 15808 SUBJECT: GRB 140209A: Swift detection of a burst DATE: 14/02/09 07:45:23 GMT FROM: David Palmer at LANL S. B. Cenko (GSFC), W. H. Baumgartner (GSFC/UMBC), V. D'Elia (ASDC), L. Izzo (URoma/ICRA), H. A. Krimm (CRESST/GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), D. M. Palmer (LANL) and E. Sonbas (NASA/GSFC/Adiyaman Univ.) report on behalf of the Swift Team: At 07:30:57 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140209A (trigger=586071). The BAT on-board calculated location is RA, Dec 81.335, +32.477 which is RA(J2000) = 05h 25m 20s Dec(J2000) = +32d 28' 37" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 5 sec. The peak count rate was ~43000 counts/sec (15-350 keV), at ~2 sec after the trigger. Due to a Moon observing constraint, Swift cannot slew to the BAT position until 04:37 UT on 2014 February 11. There will thus be no XRT or UVOT data for this trigger before this time. Burst Advocate for this burst is S. B. Cenko (brad.cenko 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.)