{
  "bibcode": "2015GCN.18736....1B",
  "body": "Elisabetta Bissaldi (Politecnico di Bari), Binbin Zhang (UAH) and\nPeter Veres (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 03:05:12.46 UT on 28 December 2015, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 151228A (trigger 472964716 / 151228129),\nwhich was also detected by the Swift/BAT\n(Ukwatta et al. 2015, GCN 18731).\nThe GBM on-ground location is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 117 degrees.\n\n\nThe GBM light curve consists of a single peak\nwith a duration (T90) of about 0.26 s (50-300 keV).\nThe time-averaged spectrum from T0-0.06 s to T0+0.32 s is\nwell fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.41 +/- 0.23 and\nthe cutoff energy, parameterized as Epeak, is 747 +/- 193 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(9.2 +/- 0.8)E-7 erg/cm^2. The 64 ms peak photon flux measured\nstarting from T0-0.06 s in the 10-1000 keV band\nis 12.4 +/- 2.0 ph/s/cm^2.\n\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 18736,
  "createdOn": 1451320919000,
  "email": "veresp@gmail.com",
  "subject": "GRB 151228A: Fermi GBM observation",
  "submitter": "Peter Veres at UAH  <veresp@gmail.com>",
  "eventId": "GRB 151228A"
}