TITLE: GCN CIRCULAR NUMBER: 16353 SUBJECT: GRB 140606A: Swift detection of a short hard burst DATE: 14/06/06 11:14:01 GMT FROM: David Palmer at LANL M. C. Stroh (PSU), A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), P. Romano (INAF-IASFPA) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 10:58:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140606A (trigger=600951). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 201.808, +37.579 which is RA(J2000) = 13h 27m 14s Dec(J2000) = +37d 34' 44" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double peak structure with a duration of about 1 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger. XRT is currently not collecting science data. There will be no XRT data on this burst until the anomaly is resolved. Details are given in GCN Circ. 16349. UVOT took a finding chart exposure of 150 seconds with the White filter starting 67 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 25% of the BAT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.01. Burst Advocate for this burst is M. C. Stroh (stroh AT astroh.org). 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.)