{
  "bibcode": "2021GCN.30557....1W",
  "body": "J. Wood (NASA/MSFC)\nreports on behalf of the Fermi GBM Team:\n\n\"At 04:57:29.03 UT on 30 July 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210730A (trigger 649313854 / 210730207)\nwhich was also detected by the Swift/BAT and Swift/XRT (E. Sonbas et al. 2021, GCN 30548).\n\nThe GBM on-ground location is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 32 degrees.\n\nThe GBM light curve consists of a single peak\nwith a duration (T90) of about 5 s (50-300 keV).\nThe time-averaged spectrum from T0 to T0+6 s is\nwell fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.68 +/- 0.07 and\nthe cutoff energy, parameterized as Epeak, is 170 +/- 11 keV\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.9 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+0.3 s in the 10-1000 keV band\nis 10.5 +/- 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": 30557,
  "createdOn": 1627679104000,
  "email": "joshua.r.wood@nasa.gov",
  "subject": "GRB 210730A: Fermi GBM observation",
  "submitter": "Joshua Wood at MSFC/Fermi-GBM  <joshua.r.wood@nasa.gov>",
  "eventId": "GRB 210730A"
}