{
  "bibcode": "2022GCN.31755....1V",
  "body": "P. Veres and C. Meegan (both UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 22:23:51.43 UT on 10 March 2022, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 220310C (trigger 668643836 / 220310933)\nwhich was also detected by the Swift/BAT (Tohuvavohu et al., GCN 31746).\nThe Fermi GBM Final Real-time Localization (GCN 31735) is consistent\nwith the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 30 degrees.\n\nThe GBM light curve shows a single peak\nwith a duration (T90) of about 16.4 s (50-300 keV).\nThe time-averaged spectrum from T0-6.1 s to T0+16.4 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.74 +/- 0.30 and\nthe cutoff energy, parameterized as Epeak, is 180 +/- 51 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.52 +/- 0.27)E-6 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0-1.7 s in the 10-1000 keV band\nis 1.28 +/- 0.18 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": 31755,
  "createdOn": 1647223915000,
  "email": "veresp@gmail.com",
  "subject": "GRB 220310C: Fermi GBM observation",
  "submitter": "Peter Veres at UAH  <veresp@gmail.com>",
  "eventId": "GRB 220310C"
}