{
  "bibcode": "2022GCN.31696....1W",
  "body": "J. Wood (NASA/MSFC) reports on behalf of the Fermi-GBM Team:\n\nSwift-BAT detected GRB 220305A at 16:13:08 UT on 05 March, 2022 (Caputo\net al. GCN 31684). There was no Fermi-GBM onboard trigger around the\ntime of the event.\n \nAn automated, blind search for short gamma-ray bursts below the onboard\ntriggering threshold in Fermi-GBM identified no counterparts.\n\nThe GBM targeted search [1], the most sensitive, coherent search for\nGRB-like signals identified a transient most significantly on the 8.192 s\ntimescale, with a location consistent with the Swift-BAT event and\na signal-to-noise ratio of 17.8, using the standard search protocol.\nThe GBM targeted search event was found with the highest\nsignificance with a \"normal\" spectrum (Band function with\nEpeak = 230 keV, alpha = -1.0, beta = -2.3) for a GRB.\n\nThis analysis is preliminary.\n\n[1] Goldstein et al. 2019 arXiv:1903.12597\n\nNote: Fermi-GBM also detected GRB 220305B at 11:33:20.48 UT on 05 March 2022\nwhich was erroneously named GRB 220305A at the time of its initial publication\n(GCN 31689, 31690). GRB 220305B is a different burst than the one\ndescribed here.",
  "circularId": 31696,
  "createdOn": 1646585257000,
  "email": "joshua.r.wood@nasa.gov",
  "subject": "Fermi GBM Sub-Threshold Detection of GRB 220305A",
  "submitter": "Joshua Wood at MSFC/Fermi-GBM  <joshua.r.wood@nasa.gov>",
  "eventId": "GRB 220305A"
}