{
  "circularId": 34869,
  "createdOn": 1697902820878,
  "submittedHow": "web",
  "subject": "GRB 231020A: Fermi GBM Detection",
  "submitter": "sumanbala2210@gmail.com",
  "bibcode": "2023GCN.34869....1B",
  "body": "S. Bala (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 18:56:58.30 UT on 20 October 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 231020A (trigger 719521023/231020790).\n\nThe Fermi GBM Final Real-time Localization is reported in GCN 34856.\n\nThe GBM light curve consists of a single bright peak with a duration (T90)\nof about 9.3 s (50-300 keV). The time-averaged spectrum\nfrom T0-0.5 to T0+21 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.34 +/- 0.01 and the cutoff energy,\nparameterized as Epeak, is 145 +/- 3 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(3.81 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+6.6 s in the 10-1000 keV band is 87.2 +/- 0.8 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 Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "eventId": "GRB 231020A"
}