{
  "bibcode": "2016GCN.19111....1S",
  "body": "Matthew Stanbro (UAH) and C. Meegan (UAH)\nreports on behalf of the Fermi GBM Team:\n\n\"At 19:57:06.33 UT on 27 February 2016, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 160227B (trigger 478295830 / 160227831).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 123.4, DEC = -48.3, with an uncertainty\nof 1.3 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which we have characterized as a core-plus-tail model, with 90% of\nGRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg\nsystematic error. [Connaughton et al. 2015, ApJS, 216, 32] ).\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 54\ndegrees.\n\nThe GBM light curve consists of 2 episodes\nwith a duration (T90) of about 8 s (50-300 keV).\nThe time-averaged spectrum from T0+0.14 s to T0+8.34 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.25 +/- 0.04 and\nthe cutoff energy, parameterized as Epeak, is 544 +/- 19 keV\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.86 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1.73 s in the 10-1000 keV band\nis 10.27 +/- 0.27 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 19111,
  "createdOn": 1456693108000,
  "email": "mcs0001@uah.edu",
  "subject": "GRB 160227B: Fermi GBM detection",
  "submitter": "Matthew Stanbro at UAH/Fermi  <mcs0001@uah.edu>",
  "eventId": "GRB 160227B"
}