{
  "bibcode": "2023GCN.33203....1H",
  "body": "R. Hamburg (CNRS/IJCLab) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 08:59:06.67 UT on 16 January 2023, the Fermi Gamma-Ray Burst Monitor\n(GBM)\ntriggered and located GRB 230116B (trigger 695552351 / 230116374), which\nwas\nalso localized by the IPN network (Kozyrev et al. 2023, GCN 33200).\nThe GBM on-ground location is consistent with the IPN position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 104\ndegrees.\n\nThe GBM light curve consists of a single pulse with a duration (T90) of\nabout 64 ms (50-300 keV). The time-averaged spectrum from T0-0.064 s to\nT0+0.128 is best fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.07 +/- 0.09 and\nthe cutoff energy, parameterized as Epeak, is 733 +/- 53 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(3.7 +/- 0.1)E-06 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0+0.0 s in the 10-1000 keV band is 75.5 +/- 3.0 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 GBM Support\nPage:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 33203,
  "createdOn": 1674323580000,
  "email": "rkh0007@uah.edu",
  "subject": "GRB 230116B: Fermi GBM observation",
  "submitter": "Rachel Hamburg at UAH  <rkh0007@uah.edu>",
  "eventId": "GRB 230116B"
}