{
  "circularId": 34886,
  "subject": "GRB 231025A: Fermi GBM Observation",
  "createdOn": 1698267893189,
  "submittedHow": "web",
  "body": "J.Mangan (CNRS/IJCLab) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 06:46:59.59 UT on 25 October 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 231025A (trigger 719909224/231025283).\nwhich was also detected by Swift/BAT-GUANO (Ronchini et al. 2023, GCN 34884).\nThe Fermi GBM Final Real-time Localization is reported in GCN 34883.\n\nThe GBM light curve consists of a single emission episode with a duration (T90)\nof about 6 s (50-300 keV). The time-averaged spectrum\nfrom T0-2.0 to T0+4.1 s is best fit by a simple power law function with index -1.4 +/- 0.1.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.2 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0-3.1 s in the 10-1000 keV band is 1.3 +/- 0.3 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/\"",
  "submitter": "Joe Mangan at IJCLab <joseph.mangan@ijclab.in2p3.fr>",
  "eventId": "GRB 231025A",
  "bibcode": "2023GCN.34886....1M"
}