{
  "bibcode": "2021GCN.30279....1P",
  "body": "S. Poolakkil (UAH) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 23:59:25.60 UT on 19 June 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210619B (trigger 645839970 / 210619999)\nwhich was also detected by the Swift/BAT (D'Avanzo et al. 2021, GCN 30261),\nFermi-LAT (Axelsson et al. 2021, GCN 30270) and Konus-Wind (Svinkin et\nal. 2021, GCN 30276).\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 109 degrees.\n\nThe GBM light curve consists of a single peak followed by some\nextended emission with a duration (T90) of about 55 s (50-300 keV).\nThe time-averaged spectrum from T0 s to T0+61.4 s\nis best fit by a Band function, with Epeak = 210 +/- 3 keV,\nalpha = -0.86 +/- 0.01 and beta = -1.99 +/- 0.01.\n\nThe event fluence (10-1000 keV) in this time interval is\n(307.93 +/- 0.9830)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+0.51 s in the 10-1000 keV band\nis 238.6 +/- 1.3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB\nCatalog:https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM\nSupport Page:https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 30279,
  "createdOn": 1624214456000,
  "email": "sp0076@uah.edu",
  "subject": "GRB 210619B: Fermi GBM detection",
  "submitter": "Suraj Poolakkil at UAH  <sp0076@uah.edu>",
  "eventId": "GRB 210619B"
}