TITLE:   GCN CIRCULAR
NUMBER:  35683
SUBJECT: GRB 240205B: Swift detection of a burst
DATE:    24/02/05 22:31:07 GMT
FROM:    David Palmer at LANL <palmer@lanl.gov>


M. J. Moss (GSFC), C. Gronwall (PSU), J.D. Gropp (PSU),
K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of
the Neil Gehrels Swift Observatory Team:

At 22:13:06 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240205B (trigger=1213095).  Swift did not immediately slew
due to a Sun constraint. 
The BAT on-board calculated location is 
RA, Dec 351.476, -55.132 which is 
   RA(J2000) = 23h 25m 54s
   Dec(J2000) = -55d 07' 55"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve is only available
up to T+8s due to a telemetry gap. The partial light curve shows a
complex rise to a count rate of ~10,000 counts/s (15-350 keV)
and still rising steeply at 8 sec after the trigger. 

This GRB is Sun constrained for Swift observations until February 25th. 
There will therefore not be any XRT or UVOT data collected. 

Burst Advocate for this burst is M. J. Moss (mikejmoss3 AT gmail.com). 
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/)