{
  "bibcode": "2020GCN.28874....1M",
  "body": "C. Malacaria (NASA-MSFC/USRA) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 02:31:05.79  UT on 9 November 2020, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 201109A (trigger 626581870 / 201109105).\nThe Fermi GBM Final Real-time Localization was reported in GCN 28868.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 66 degrees.\n\nThe GBM light curve consists of a bright peak\nwith a duration (T90) of about 0.45 s (50-300 keV).\nThe time-averaged spectrum from T0-0.128 s to T0+0.384 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -0.61 +/- 0.11 and\nthe cutoff energy, parameterized as Epeak, is 318 +/- 41 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(9.55 +/- 0.72)E-07 erg/cm^2. The 64-msec peak photon flux measured\nstarting from T0+64 ms in the 10-1000 keV band\nis 18.4 +/- 1.2 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak= 304 +/- 56 keV, alpha = -0.59 +/- 0.14 and beta = -2.93 +/- 1.42 .\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": 28874,
  "createdOn": 1604954869000,
  "email": "cmalacaria@usra.edu",
  "subject": "GRB 201109A: Fermi GBM detection",
  "submitter": "Christian Malacaria at NASA-MSFC/USRA  <cmalacaria@usra.edu>",
  "eventId": "GRB 201109A"
}