GRB 251014D: Swift detection of a burst

Abstract

At 21:54:40.55 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 251014D (trigger=1404126). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 323.918, -41.839 which is RA(J2000) = 21h 35m 40s Dec(J2000) = -41d 50' 20" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve is not available because of a telemetry gap; however, the rate significance of 8.71 indicates that the event is likely real. The XRT began observing the field at 21:57:16.2 UT, 155.7 seconds after the BAT trigger. No source was detected in the 2.5-s promptly available image. We are waiting for the full dataset to detect and localise the XRT counterpart. The UVOT source list for the first white image shows no detection of a new source. Typical upper limits are 17th magnitude. Further details will become available when the full data are downloaded. Burst Advocate for this burst is N. J. Klingler (noelklin AT umbc.edu). 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/)