{
  "bibcode": "2023GCN.33173....1S",
  "body": "E. Sonbas (Adiyaman Univ.), R. A. J. Eyles-Ferris (U Leicester),\nC. Gronwall (PSU), J.D. Gropp (PSU), A. Y. Lien (U Tampa),\nK. L. Page (U Leicester), D. M. Palmer (LANL),\nA. Tohuvavohu (U Toronto) and M. A. Williams (PSU) report on behalf of\nthe Neil Gehrels Swift Observatory Team:\n\nAt 15:33:21 UT, the Swift Burst Alert Telescope (BAT) triggered and\nlocated GRB 230116C (trigger=1149250).  Due to an observing constraint,\nSwift could not slew to the burst. \nThe BAT on-board calculated location is \nRA, Dec 223.463, -16.871 which is \n   RA(J2000) = 14h 53m 51s\n   Dec(J2000) = -16d 52' 16\"\nwith an uncertainty of 3 arcmin (radius, 90% containment, including \nsystematic uncertainty).  Although this is an image trigger, the\nBAT lightcurve seems to show a complex structure starting around T-50\nuntil a pre-planned slew away from the burst location at T+30, with\na peak of ~300 counts/s (15-350 keV) near the time of the trigger. \n\nDue to a Moon observing constraint, Swift cannot slew to the BAT\nposition until 09:10 UT on 2023 January 18. There will thus be no XRT\nor UVOT data for this trigger before this time. \n\nBurst Advocate for this burst is E. Sonbas (edasonbas AT yahoo.com). \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/)",
  "circularId": 33173,
  "createdOn": 1673884405000,
  "email": "palmer@lanl.gov",
  "subject": "GRB 230116C: Swift detection of a burst",
  "submitter": "David Palmer at LANL  <palmer@lanl.gov>",
  "eventId": "GRB 230116C"
}