{
  "format": "text/plain",
  "submitter": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov>",
  "circularId": 37284,
  "bibcode": "2024GCN.37284....1S",
  "subject": "GRB 240824B: Fermi GBM Observation",
  "eventId": "GRB 240824B",
  "submittedHow": "web",
  "createdOn": 1724618321270,
  "body": "V. Sharma (NASA GSFC/UMBC), and C. Meegan (UAH) report on behalf of the \nFermi Gamma-ray Burst Monitor Team:\n\nAt 13:11:16.70 UT on 24 August 2024, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 240824B (trigger 746197881/240824549), which was \nalso detected by MAXI/GSC detection (M. Nakajima et al., 2024, GCN 37261), \nSwift-BAT (J. DeLaunay et al. 2024, GCN 37267), and Swift-XRT (A. Tohuvavohu \net al. 2024, GCN 37269 and J.A. Kennea et al. 2024, GCN 37270). \nThe Final Real-time Localization (Fermi GBM Team 2024, GCN 37260) \nis consistent with the MAXI/GSC, and Swift.\n\nThe angle from the Fermi LAT boresight is 79 degrees.\n\nThe GBM light curve many short peaks with a duration (T90)\nof about 1.5 s (50-300 keV). The time-averaged spectrum\nfrom T0-0.96 to T0+0.90 s is best fit by a power law \nfunction with an exponential high-energy cutoff.\nThe power law index is -0.83 +/- 0.38 and the cutoff energy,\nparameterized as Epeak, is 339 +/- 200 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(4 +/- 1)E-07 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0-0.64 s in the 10-1000 keV band is 3 +/- 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/\""
}