{
  "bibcode": "2018GCN.22378....1V",
  "body": "P. Veres and C. Meegan (both UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 02:36:16.93 UT on 04 February 2018, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 180204A (trigger 539404581 / 180204109) which was also detected by the Swift/BAT (Page et al., GCN 22375).\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 68 degrees.\n\nThe GBM light curve shows two peaks\nwith a duration (T90) of about 1.2 s (50-300 keV).\nThe time-averaged spectrum from T0-0.1 s to T0+1.2 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.92 +/- 0.07 and\nthe cutoff energy, parameterized as Epeak, is 781 +/- 161 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(8.48 +/- 0.32)E-7 erg/cm^2. The 64-msec peak photon flux measured\nstarting from T0 in the 10-1000 keV band\nis 19.7 +/- 1.6 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 22378,
  "createdOn": 1517754286000,
  "email": "adam.m.goldstein@msfc.nasa.gov",
  "subject": "GRB 180204A: Fermi GBM detection",
  "submitter": "Adam Goldstein at Fermi-GBM/UAH  <adam.m.goldstein@msfc.nasa.gov>",
  "eventId": "GRB 180204A"
}