GCN Circular 37383

M. H. Siegel (PSU), S. Dichiara (PSU), R. Gupta (NASA GSFC),
J. A. Kennea (PSU), M. J. Moss (GSFC), K. L. Page (U Leicester) and
M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift
Observatory Team:

At 16:04:19 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240904A (trigger=1252402).
The BAT on-board calculated location is 
RA, Dec 136.440, -30.506 which is 
   RA(J2000) = 09h 05m 46s
   Dec(J2000) = -30d 30' 22"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty). The BAT light curve showed a complex
structure with many pulses and a total duration of about 22 sec.  
The peak count rate was ~800 counts/sec (15-350 keV), at ~4 sec after 
the trigger.

Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 13:50 UT on 2024 September 10. There will thus be no XRT
or UVOT data for this trigger before this time.

Burst Advocate for this burst is M. H. Siegel (siegel AT swift.psu.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/)