{
  "circularId": 35205,
  "createdOn": 1701131925782,
  "submittedHow": "web",
  "bibcode": "2023GCN.35205....1D",
  "eventId": "GRB 231123C",
  "subject": "GRB 231123C: Fermi GBM Observation",
  "submitter": "Sarah Dalessi at UAH <sd0104@uah.edu>",
  "body": "S. Dalessi (UAH), S. Lesage (UAH) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 19:58:25.38 UT on 23 November 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 231123C (trigger 722462310/231123832).\nwhich was also detected by Swift/BAT-GUANO (J. DeLaunay et al. 2023, GCN 35179).\nThe Fermi Final Localization was reported in GCN 35171.\n\nThe angle from the Fermi LAT boresight is 90 degrees.\n\nThe GBM light curve single peak with a duration (T90)\nof about 0.4 s (50-300 keV). The time-averaged spectrum\nfrom T0-0.1 to T0+0.4 s is best fit by\na Power law function with alpha = -1.29 +/- 0.06.\n\nThe event fluence (10-1000 keV) in this time interval is\n(3.3 +/- 0.4)E-07 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0-0.064 s in the 10-1000 keV band is 5 +/- 1 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/\""
}