{
  "submittedHow": "web",
  "submitter": "Peter Veres at University of Alabama in Huntsville <veresp@gmail.com>",
  "eventId": "GRB 231028A",
  "body": "P. Veres (UAH) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 04:09:06.66 UT on 28 October 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 231028A (trigger 720158951/231028173),\nwhich was also detected by the Swift/BAT (Williams et al. 2023, GCN 34894).\nThe Fermi GBM Final Real-time Localization (GCN 34893) is consistent with the Swift position.\n\n\nThe GBM light curve consists of multiple peaks with a duration (T90)\nof about 34.8 s (50-300 keV). The time-averaged spectrum\nfrom T0-4.1 to T0+43.0 s is best fit by\na Band function with Epeak = 157 +/- 11 keV,\nalpha = -0.72 +/- 0.06, and beta = -2.13 +/- 0.08.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.95 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.0 s in the 10-1000 keV band is 14.8 +/- 0.4 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/\"",
  "subject": "GRB 231028A: Fermi GBM Detection",
  "circularId": 34899,
  "createdOn": 1698533143734,
  "bibcode": "2023GCN.34899....1V"
}