{
  "bibcode": "2021GCN.30210....1P",
  "body": "S. Poolakkil (UAH) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 03:56:02.12 UT on 6 June 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210606A (trigger 644644567 / 210606164)\nwhich was also detected by the Swift/BAT-GUANO (DeLaunay et al. 2021, GCN\n30134)\nThe Fermi GBM Final Real-time Localization (GCN 30131) is consistent with\nthe Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 108\ndegrees.\n\nThe GBM light curve consists of a single peak followed by some\nextended emission with a duration (T90) of about 11 s (50-300 keV).\nThe time-averaged spectrum from T0-4.09 s to T0-1.02 s\nis best fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -0.99 +/- 0.22  and\nthe cutoff energy, parameterized as Epeak, is 195 +/- 62 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(0.845 +/- 0.144)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0-2.05 s in the 10-1000 keV band\nis 2.5 +/- 0.3 ph/s/cm^2.\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\nPage:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 30210,
  "createdOn": 1623445106000,
  "email": "sp0076@uah.edu",
  "subject": "GRB 210606A: Fermi GBM detection",
  "submitter": "Suraj Poolakkil at UAH  <sp0076@uah.edu>",
  "eventId": "GRB 210606A"
}