{
  "bibcode": "2021GCN.30490....1W",
  "body": "J. Wood (NASA/MSFC)\nreports on behalf of the Fermi GBM Team:\n\n\"At 20:54:40.87 UT on 22 July 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210722A (trigger 648680085 / 210722871)\nwhich was also detected by the Swift/BAT and Swift/XRT (P. D'Avanzo et al. 2021, GCN 30475).\n\nThe GBM on-ground location is consistent with the Swift position.\n\nThe GBM light curve consists of a single peak\nwith a duration (T90) of about 62 s (50-300 keV).\nThe time-averaged spectrum from T0-1.5 s to T0+62 s is\nwell fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -1.1 +/- 0.1 and\nthe cutoff energy, parameterized as Epeak, is 160 +/- 30 keV\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.8 +/- 0.6)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+2.3 s in the 10-1000 keV band\nis 4.0 +/- 0.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 30490,
  "createdOn": 1627075766000,
  "email": "joshua.r.wood@nasa.gov",
  "subject": "GRB 210722A: Fermi GBM observation",
  "submitter": "Joshua Wood at MSFC/Fermi-GBM  <joshua.r.wood@nasa.gov>",
  "eventId": "GRB 210722A"
}