TITLE: GCN CIRCULAR NUMBER: 36743 SUBJECT: GRB 240624A: Swift detection of a burst DATE: 24/06/24 06:10:39 GMT FROM: David Palmer at LANL N. J. Klingler (GSFC/UMBC/CRESSTII), K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of the Neil Gehrels Swift Observatory Team: At 06:01:09 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 240624A (trigger=1238732). Swift did not slew to the location due to an observing constraint. The BAT on-board calculated location is RA, Dec 102.444, -6.543 which is RA(J2000) = 06h 49m 47s Dec(J2000) = -06d 32' 36" 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 5 sec. The peak count rate was ~2200 counts/sec (15-350 keV), at ~1 sec after the trigger. Due to a Sun observing constraint, Swift cannot slew to the BAT position until 10:01 UT on 2024 August 15. There will thus be no XRT or UVOT data for this trigger before this time. 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/)