{
  "bibcode": "2020GCN.29073....1M",
  "body": "C. Malacaria (NASA-MSFC/USRA), P. Veres (UAH), \nC. Meegan (UAH) and E. Bissaldi (Politecnico and INFN Bari)\nreport on behalf of the Fermi GBM Team:\n\n\"At 23:07:25.75 UT on 16 December 2020, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 201216C (trigger 629852850 / 201216963),\nwhich was also detected by the Swift/BAT (Beardmore et al. 2020, GCN 29061).\nThe Fermi GBM Final Real-time Localization (GCN 29063) is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 94 degrees.\n\nGRB 201216C is particularly bright and hard.\nThe GBM light curve shows a broad, structured peak\nwith a duration (T90) of about 29.9 s (50-300 keV).\nThe time-averaged spectrum from T0-0.003 s to T0+49.665 s is\nbest fit by a Band function with Epeak = 326 +/- 7  keV,\nalpha = -1.06 +/- 0.01, and beta = -2.25 +/- 0.03.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.41 +/- 0.06)E-4 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+24.8 s in the 10-1000 keV band\nis 54.9 +/- 0.6 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 Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 29073,
  "createdOn": 1608217407000,
  "email": "cmalacaria@usra.edu",
  "subject": "GRB 201216C: Fermi GBM detection",
  "submitter": "Christian Malacaria at NASA-MSFC/USRA  <cmalacaria@usra.edu>",
  "eventId": "GRB 201216C"
}