{
  "bibcode": "2021GCN.30595....1B",
  "body": "E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\n\"At 11:55:44.40 UT on 3 August 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210803A (trigger 649684549 / 210803497).\nThe on-ground calculated location, using the GBM trigger data, is\n\nRA = 218.7, DEC = -21.4\n\n(J2000 degrees, equivalent to 14h 34m, -21d 24'),\nwith a statistical uncertainty of 1 degree (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\nat the GBM trigger time is 98 degrees.\n\nThe GBM light curve consists of bright, FRED-like emission episode\nwith a duration (T90) of about 9 s (50-300 keV).\nThe time-averaged spectrum from T0 to T0+9 s is\nwell fit by a Band function with Epeak = 164 +/- 19 keV,\nalpha = -1.20 +/- 0.05, and beta = -2.06 +/- 0.07.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.28 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+0.4 s in the 10-1000 keV band\nis 35.7 +/- 0.6 ph/s/cm^2.\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": 30595,
  "createdOn": 1628068037000,
  "email": "elisabetta.bissaldi@ba.infn.it",
  "subject": "GRB 210803A: Fermi GBM observation",
  "submitter": "Elisabetta Bissaldi at INFN,Bari  <elisabetta.bissaldi@ba.infn.it>",
  "eventId": "GRB 210803A"
}