TITLE:   GCN CIRCULAR
NUMBER:  39877
SUBJECT: GRB 250327A: Swift detection of a burst
DATE:    25/03/27 08:11:09 GMT
FROM:    Jamie Kennea at Penn State <jak51@psu.edu>

T. M. Parsotan (GSFC), J. J. DeLaunay (PSU), R. Gupta (NASA GSFC),
J. A. Kennea (PSU) and K. L. Page (U Leicester) report on behalf of
the Neil Gehrels Swift Observatory Team:

At 07:30:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 250327A (trigger=1299088).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 248.197, +61.595 which is 
   RA(J2000) = 16h 32m 47s
   Dec(J2000) = +61d 35' 43"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a complex
structure with a duration of about 40 sec.  The peak count rate
was ~1648 counts/sec (15-350 keV), at ~3 sec after the trigger.

Due to an observing constraint, Swift did not get data immediately. We will 
report on XRT data in a later GCN.

Burst Advocate for this burst is T. M. Parsotan (tyler.parsotan 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/)