{
  "bibcode": "2020GCN.28013....1D",
  "body": "James DeLaunay (PSU), Aaron Tohuvavohu (U Toronto), Jamie Kennea\n(PSU), and Peter Veres (UAH) report:\n\nSwift/BAT did not trigger on GRB 2006023A (T0: 2020-06-23 03:18:00\nUTC, Fermi/GBM Team GCN 28011).\n\nThe Fermi/GBM notice, distributed at T0+24 seconds triggered the Swift\nMission Operations Center operated Gamma-ray Urgent Archiver for Novel\nOpportunities (GUANO; Tohuvavohu et al. 2020, arXiv: 2005.01751). Upon\ntrigger by these notices, GUANO sent a command to the Swift Burst\nAlert Telescope (BAT) to save 200 seconds of BAT event-mode data from\n[-50,+150] seconds around the time of the burst. All the requested\nevent mode data was delivered to the ground.\n\nIn a ground analysis of the data, we detect the burst in the full\ndetector-summed rates (no localization information) with an SNR of\n~12.\nThe detected duration is ~0.2 seconds.\n\nWith a maximum likelihood analysis (DeLaunay et al. 2020, in prep.) on\nthe event-mode data we detect a location for the burst with a square\nroot of the test statistic, sqrt(TS), of 9.8. The sqrt(TS) behaves\nsimilarly to SNR.\nUsing the normal BAT imaging technique, we find an SNR of 6.4 at the\nsame location.\n\nThe BAT ground-calculated position is\nRA, Dec = 242.0952, +53.4678 deg which is\n   RA(J2000)  = 16h 8m 22.8s\n   Dec(J2000) = +53d 28��� 4���\nwith an uncertainty of 4 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 67.19%.\n\nThis position is consistent with the Fermi GBM localization (GCN\n28011), falling on the 58% containment contour.\n\nXRT and UVOT follow-up has been triggered. Results of follow-up\nobservations 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/\n\n[GCN OPS NOTE(23jun20): Per author's request, the sexagesimal Dec\nwas changed from +51d 28' 4\"  to  +53 28' 4\".]",
  "circularId": 28013,
  "createdOn": 1592918289000,
  "email": "aaron.tohu@gmail.com",
  "subject": "GRB 200623A: Swift/BAT-GUANO detection and arcminute localization of a short GRB",
  "submitter": "Aaron Tohuvavohu at U Toronto  <aaron.tohu@gmail.com>",
  "eventId": "GRB 200623A"
}