{
  "bibcode": "2024GCN.35733....1D",
  "eventId": "GRB 240215A",
  "body": "James DeLaunay (PSU), Aaron Tohuvavohu (U Toronto), Samuele Ronchini (PSU), Gayathri Raman (PSU), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC)  report:\n\nSwift/BAT did not localize GRB 240215A onboard (T0: 2024-02-15T15:33:00.41 UTC, Fermi/GBM trigger 729703985).\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\nIn ground analysis of the available TTE data, we find the position of\nthe burst with SNR 13.9 in the image domain.\n\nAt the time of the trigger, Swift did not have a lock on its star tracker so positions may be inaccurate by up to a few tenths of a degree. \n\nThe BAT position is\nRA, Dec = 132.237, -6.4058, which is:\n    RA (J2000)     08h 48m 56.88s\n    Dec (J2000)  -06d 24' 20.88\"\nwith an estimated statistical uncertainty of 3 arcminutes plus ~15 arcminutes due to loss of star tracker loss\n\nXRT and UVOT follow-up has been requested.\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/",
  "submitter": "Jimmy DeLaunay at Penn State <delauj2@gmail.com>",
  "circularId": 35733,
  "createdOn": 1708033110898,
  "subject": "GRB 240215A: Swift/BAT-GUANO localization of a burst",
  "submittedHow": "web"
}