GCN Circular 42274

N. J. Klingler (GSFC/UMBC/CRESSTII), S. Dichiara (PSU),
R. Gupta (NASA GSFC), N. P. M. Kuin (UCL-MSSL), A. Mei (INAF-OAB),
C. Salvaggio (INAF-OAB) and T. Sbarrato (INAF-OAB) report on behalf of
the Neil Gehrels Swift Observatory Team:

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/)