{
  "body": "A. D'Ai (INAF-IASFPA), S. Dichiara (PSU), R. Gupta (NASA GSFC),\nH. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (U Tampa) and\nT. M. Parsotan (GSFC) report on behalf of the Neil Gehrels Swift\nObservatory Team:\n\nAt 01:36:15 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 241229B (trigger=1277428).  Swift did not slew immediately to the burst.\nThe BAT on-board calculated location is \nRA, Dec 274.149, +74.714 which is \n   RA(J2000) = 18h 16m 36s\n   Dec(J2000) = +74d 42' 50\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  The BAT light curve showed a multi-peaked\nstructure with a duration of about 10 sec.  The peak count rate\nwas ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger.\n\nDue to an observing constraint, Swift cannot slew to the BAT position.\nThere will thus be no XRT or UVOT data for this trigger.\n\nBurst Advocate for this burst is A. D'Ai (antonino.dai AT inaf.it).\nPlease contact the BA by email if you require additional information\nregarding Swift followup of this burst. In extremely urgent cases, after\ntrying the Burst Advocate, you can contact the Swift PI by phone (see\nSwift TOO web site for information: http://www.swift.psu.edu/)\n\n",
  "submitter": "Amy <yarleen@gmail.com>",
  "eventId": "GRB 241229B",
  "createdOn": 1735437168598,
  "submittedHow": "email",
  "circularId": 38699,
  "subject": "GRB 241229B: Swift detection of a burst",
  "bibcode": "2024GCN.38699....1D"
}