{
  "eventId": "GRB 241105A",
  "submittedHow": "web",
  "submitter": "Aaron Tohuvavohu at Caltech <aaron.tohu@gmail.com>",
  "createdOn": 1730856971719,
  "bibcode": "2024GCN.38091....1D",
  "circularId": 38091,
  "format": "text/plain",
  "subject": "GRB 241105A: Swift/BAT-GUANO arcminute localization of a short burst",
  "body": "James DeLaunay (PSU), Aaron Tohuvavohu (Caltech), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC)  report:\n\nSwift/BAT did not localize GRB 241105A onboard (T0: 2024-11-05T16:06:04 UTC, Fermi GCN 38085).\n\nThe Fermi notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1). \n\nUpon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground.\n\nThe position of the burst is found via BAT imaging with SNR of 11. \nThe position is:\nRA, Dec = 66.2381, -49.7547 deg which is\n   RA(J2000)  = 04h 24m 57.14s\n   Dec(J2000) = -49d 45′ 16.9″\nwith an estimated uncertainty of 3 arcmin radius.\n\nThis BAT-GUANO position is coincident with the optical transient discovered by GOTO (GCN 38088).\n\nXRT and UVOT follow-up has been triggered.\nResults of follow-up observations will be reported in future circulars.\n\nGUANO is a fully autonomous, extremely low latency, spacecraft\ncommanding pipeline designed for targeted recovery of BAT event mode\ndata around the times of compelling astrophysical events to enable\nmore sensitive GRB searches.\n\nA live reporting of Swift/BAT event data recovered by GUANO can be\nfound at: https://www.swift.psu.edu/guano/"
}