{
  "bibcode": "2021GCN.31011....1P",
  "body": "S. Poolakkil (UAH) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 01:34:11.40 UT on 24 October 2021, the Fermi Gamma-Ray Burst Monitor\n(GBM)\ntriggered and located GRB 211024A (trigger 656732056 / 211024065)\nwhich was also detected by the Swift/BAT-GUANO (Tohuvavohu et al. 2021, GCN\n31006).\nThe GBM on-ground location is consistent with the Swift/BAT-GUANO position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 119\ndegrees.\n\nThe GBM light curve consists of a single emission episode\nwith a duration (T90) of about 0.06 s (50-300 keV).\nThe time-averaged spectrum from T0-0.128 s to T0+0.128 s\nis best fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -0.23 +/- 0.39  and\nthe cutoff energy, parameterized as Epeak, is 145 +/- 27 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.95 +/- 0.28)E-07 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0 s in the 10-1000 keV band\nis 10.4 +/- 1.4 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\nPage:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 31011,
  "createdOn": 1635287894000,
  "email": "sp0076@uah.edu",
  "subject": "GRB 211024A: Fermi GBM detection",
  "submitter": "Suraj Poolakkil at UAH  <sp0076@uah.edu>",
  "eventId": "GRB 211024A"
}