{
  "circularId": 34950,
  "body": "S. Bala (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 01:47:28.14 UT on 04 November 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 231104A (trigger 720755253/231104075).\nwhich was also detected by Swift BAT (K. L. Page et al. 2023, GCN 34938) and \nFermi LAT (G. Principe. et al. 2023, GCN 34943).\nThe Fermi GBM on-ground location is consistent with the Swift BAT position.\n\nThe angle from the Fermi LAT boresight is 32 degrees.\n\nThe GBM light curve Consist of three distinguishable pick with a duration (T90)\nof about 44 s (50-300 keV). The time-averaged spectrum\nfrom T0-3.6 to T0+62.0 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.07 +/- 0.01 and the cutoff energy,\nparameterized as Epeak, is 539 +/- 22 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.59 +/- 0.06)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+3.6 s in the 10-1000 keV band is 2 +/- 0.2 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak= 490 +/- 20 keV, alpha = -1.05 +/- 0.02 and beta = -2.6 +/- 0.2.\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/\"",
  "createdOn": 1699162267681,
  "subject": "GRB 231104A: Fermi GBM Observation",
  "bibcode": "2023GCN.34950....1B",
  "eventId": "GRB 231104A",
  "submitter": "sumanbala2210@gmail.com",
  "submittedHow": "web"
}