{
  "bibcode": "2021GCN.29628....1V",
  "body": "P. Veres, B. Hristov and C. Meegan (all UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 19:02:59.40 UT on 05 March 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210305A (trigger 636663784 / 210305794),\nwhich was also detected by the Swift/BAT/XRT (D'Ai et al., GCN 29595).\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 90 degrees.\n\nThe GBM light curve shows multiple overlapping pulses\nwith a duration (T90) of about 61.7 s (50-300 keV).\nThe time-averaged spectrum from T0-11.3 s to T0+59.4 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.17 +/- 0.09 and\nthe cutoff energy, parameterized as Epeak, is 98 +/- 3 keV.\n\nA Band function fits the spectrum equally well\nwith Epeak= 95 +/- 4 keV, alpha = -0.11 +/- 0.11 and beta = -3.25 +/- 0.45.\n\nThe event fluence (10-1000 keV) in this time interval is\n(9.4 +/- 0.2)E-6 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+6.3 s in the 10-1000 keV band\nis 4.6 +/- 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": 29628,
  "createdOn": 1615243348000,
  "email": "veresp@gmail.com",
  "subject": "GRB 210305A: Fermi GBM observation",
  "submitter": "Peter Veres at UAH  <veresp@gmail.com>",
  "eventId": "GRB 210305A"
}