{
  "bibcode": "2022GCN.31508....1L",
  "body": "S. Lesage (UAH) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 04:45:55 UT on 17 January 2022, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 220117C (trigger 664087560/220117199)\nwhich was also detected by Swift/BAT-GUANO (Raman et al. 2022, GCN 31501).\nThe Fermi GBM on-ground location is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight is 73 degrees.\n\nThe GBM light curve consists of multiple pulses with a duration (T90)\nof about 115 s (10-1000 keV). The time-averaged spectrum\nfrom T0-1.8 to T0+114.9 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is 0.1 +/- 0.3 and the cutoff energy,\nparameterized as Epeak, is 82 +/- 6 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(4.6 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.7 s in the 10-1000 keV band is 6.4 +/- 0.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB\nCatalog:https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM\nSupport Page:https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 31508,
  "createdOn": 1642712295000,
  "email": "sjl0014@uah.edu",
  "subject": "GRB 220117C: Fermi GBM Observation",
  "submitter": "Stephen Lesage at Fermi-GBM Team  <sjl0014@uah.edu>",
  "eventId": "GRB 220117C"
}