{
  "bibcode": "2021GCN.29393....1B",
  "body": "E. Bissaldi (Politecnico and INFN Bari)\nreports on behalf of the Fermi GBM Team:\n\n\n\"At 06:29:25.66 UT on 4 February 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210204A (trigger 634112970 / 210204270).\nThe Fermi GBM Final Real-time Localization was reported in GCN 29390.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 57 degrees.\n\nThe GBM light curve consists of multiple emission episodes\nwith a duration (T90) of about 210 s (50-300 keV).\nThe time-averaged spectrum encompassing the first two emission\nepisodes from T0-8 s to T0+45 s is\nadequately fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -1.51 +/- 0.07 and\nthe cutoff energy, parameterized as Epeak, is 162 +/- 33 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.76 +/- 0.04)E-6 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+201.5 s in the 10-1000 keV band\nis 29.3 +/- 0.4 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak = 140 +/- 50 keV, alpha = -1.5 +/- 0.1,\nand beta = -2.3 +/- 0.5.\n\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": 29393,
  "createdOn": 1612455419000,
  "email": "elisabetta.bissaldi@ba.infn.it",
  "subject": "GRB 210204: Fermi GBM observation",
  "submitter": "Elisabetta Bissaldi at INFN,Bari  <elisabetta.bissaldi@ba.infn.it>",
  "eventId": "GRB 210204"
}