{
  "bibcode": "2022GCN.31392....1H",
  "body": "Boyan A. Hristov (MPE/UAH) reports on behalf of the\nFermi GBM Team:\n\n\"At 04:01:02.60 UT on 04 January 2022, the Fermi Gamma-Ray\nBurst Monitor (GBM) triggered and located GRB 220104A\n(trigger 662961667 / 220104167) which was also detected by\nGECAM (Z. W. Guo et al. 2022, GCN 31382).\n\nThe GBM on-ground location (GCN 31380) is consistent with the\nGECAM position.\n\nThe GBM light curve consists of multiple peaks with a duration\n(T90) of about 2.624 s (50-300 keV).  The time-averaged\nspectrum from T0-0.128 s to T0+0.320 s is best fit by a simple\npower law function with index -1.28 +/- 0.05.\n\nThe event fluence (10-1000 keV) in this time interval is\n(3.5 +/- 0.34)E-07 erg/cm^2.\nThe 64-miliseconds peak photon flux measured starting from\nT0-0.064 s in the 10-1000 keV band\nis 4.00 +/- 0.98 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\nGBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 31392,
  "createdOn": 1641413651000,
  "email": "bah0046@uah.edu",
  "subject": "GRB 220104A: Fermi GBM Observation",
  "submitter": "Boyan A. Hristov at UAH  <bah0046@uah.edu>",
  "eventId": "GRB 220104A"
}