{
  "bibcode": "2021GCN.31057....1T",
  "body": "Swift/BAT did not successfully trigger on GRB 211107B (T0: 2021-11-07\n17:27:10 UTC).\n\nSwift/BAT triggered in real-time onboard in the rates domain (trigger\n#1082818), but no strong source was found to be associated in the\nonboard imaging. This 'failed trigger' resulted in 10s of BAT TTE data\nbeing saved and sent to the ground.\n\nThe duration of the burst, as seen by BAT, is ~15 seconds.\n\nIn ground analysis of the available TTE data, we find the position of\nthe burst with SNR 12.6 in the image domain.\nThe BAT position is\nRA, Dec = 65.7949 -27.5524, which is:\n    RA (J2000)     04h 23m 10.78s\n    Dec (J2000)  -27d 33' 8.6\"\nwith an estimated uncertainty of 2 arcminutes.\n\nXRT and UVOT follow-up has been requested. Results of follow-up\nobservations will be reported in future circulars.",
  "circularId": 31057,
  "createdOn": 1636409517000,
  "email": "aaron.tohu@gmail.com",
  "subject": "GRB 211107B: Swift/BAT detection",
  "submitter": "Aaron Tohuvavohu at U Toronto  <aaron.tohu@gmail.com>",
  "eventId": "GRB 211107B"
}