{
  "bibcode": "2021GCN.30382....1M",
  "body": "C. Malacaria (USRA) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\nAt 16:25:18.89  UT on 04 July 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210704B (trigger 647108723 / 210704684).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 203.44, DEC = -41.87 (J2000 degrees,\nequivalent to 13 h 33 m, -41 d 52 '), with a statistical uncertainty\nof 1.00 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 87 degrees.\n\nThe GBM light curve shows multiple peaks\nwith a duration (T90) of about 43.5 s (50-300 keV).\nThe time-averaged spectrum from T0-0.5 s to T0+8.7 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.64 +/- 0.06 and\nthe cutoff energy, parameterized as Epeak, is 350.8 +/- 26.3 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(8.1 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+28.6 s in the 10-1000 keV band\nis 16.1 +/- 0.4 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": 30382,
  "createdOn": 1625510037000,
  "email": "cmalacaria@usra.edu",
  "subject": "GRB 210704B: Fermi GBM detection",
  "submitter": "Christian Malacaria at NASA-MSFC/USRA  <cmalacaria@usra.edu>",
  "eventId": "GRB 210704B"
}