{
  "bibcode": "2021GCN.30590....1R",
  "body": "O.J. Roberts (USRA/NASA-MSFC) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 20:08:06.49 UT on 02 August 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210802A (trigger 649627691 / 210802839), which was \nalso detected by Fermi-LAT (F. Longo et al. 2021, GCN 30589).\nThe Fermi GBM on-ground location is consistent with the LAT position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 51 degrees.\n\nThe GBM light curve consists of multiple bright pulses\nwith a duration (T90) of about 11 s (50-300 keV).\nThe time-averaged spectrum from T0-0.3 s to T0+12.8 s is\nwell fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -0.66 +/- 0.02 and\nthe cutoff energy, parameterized as Epeak, is 372 +/- 12 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.10 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+6.6 s in the 10-1000 keV band\nis 16.4 +/- 0.3 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak= 365 +/- 15 keV, alpha = -0.65 +/- 0.03 and beta = -3.22 +/- 0.75.\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": 30590,
  "createdOn": 1628002726000,
  "email": "oliver.roberts@nasa.gov",
  "subject": "GRB 210802A: Fermi GBM detection",
  "submitter": "Oliver J Roberts at USRA/NASA  <oliver.roberts@nasa.gov>",
  "eventId": "GRB 210802A"
}