TITLE: GCN CIRCULAR NUMBER: 16098 SUBJECT: Swift Trigger 595616: a possible GRB DATE: 14/04/13 00:29:27 GMT FROM: Valerio D'Elia at ASDC V. D'Elia (ASDC), S. T. Holland (STScI), L. Izzo (URoma/ICRA), F. E. Marshall (NASA/GSFC) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team: At 00:09:40 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 140413A (trigger=595616). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 65.449, -51.205 which is RA(J2000) = 04h 21m 48s Dec(J2000) = -51d 12' 17" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This is an image trigger and we cannot say much about the light curve. However, since it is 12.5 sigma detection at 64 sec exposure in the image domain, it is likely to be real. Due to an observing constraint, Swift will not slew until T0+33.6 minutes. There will be no XRT or UVOT data until this time. Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it). 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.)