{
  "bibcode": "2021GCN.30233....1V",
  "body": "P. Veres (UAH), B. Hristov (UAH) and C. Fletcher (USRA) and C. Meegan\n(UAH) report on behalf of the Fermi GBM Team:\n\n\"At 15:03:42.75 UT on 10th of June 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210610A (trigger 645030227 / 210610628).\n\nThe burst was also detected by the Swift/BAT (Page et al., GCN 30160).\nThe GBM on-ground location is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 67 degrees.\n\nThe GBM light curve consists of two pulses with a duration (T90) of\nabout 8 s (50-300 keV). The time-averaged spectrum from T0-3.1 s to\nT0+4.6 s is adequately fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -1.11 +/- 0.15 and the\ncutoff energy, parameterized as Epeak, is 247 +/- 74 keV.\n\n\nThe event fluence (10-1000 keV) in this time interval is (1.78 +/-\n0.23)E-6 erg/cm^2. The 1-sec peak photon flux measured starting from\nT0+0.7 s in the 10-1000 keV band is 3.6 +/- 0.3 ph/s/cm^2.\n\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": 30233,
  "createdOn": 1623677712000,
  "email": "veresp@gmail.com",
  "subject": "GRB 210610A: Fermi GBM observations",
  "submitter": "Peter Veres at UAH  <veresp@gmail.com>",
  "eventId": "GRB 210610A"
}