{
  "bibcode": "2022GCN.31816....1V",
  "body": "P. Veres (UAH), E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 10:17:40.89 UT on 1 April 2022, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 220401A (trigger 670501065 / 220401429).\n\nThe localization was reported in GCN 31811.\n\nThe GBM lightcurve consists of two emission episodes\nwith a duration (T90) of about 39.2 s (50-300 keV).\nThe time-averaged spectrum from T0-8.2 s to T0+38.9 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -1.37 +/- 0.08\n and the cutoff energy, parameterized as Epeak, is 46 +/- 2 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.42 +/- 0.06)E-6 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+7.0 s in the 10-1000 keV band\nis 7.8 +/- 0.3 ph/s/cm^2.\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": 31816,
  "createdOn": 1648905943000,
  "email": "veresp@gmail.com",
  "subject": "GRB 220401A: Fermi GBM observation",
  "submitter": "Peter Veres at UAH  <veresp@gmail.com>",
  "eventId": "GRB 220401A"
}