{
  "submittedHow": "web",
  "bibcode": "2024GCN.37436....1D",
  "body": "S. Dalessi (UAH), A. Myers (NPP/GSFC) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 04:27:16.14 UT on 05 September 2024, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 240905B (trigger 747203241/240905186).\nwhich was also detected by AstroSat (J. Joshi et al. 2024, GCN 37391) and Fermi-LAT (R. Gupta et al. 2024, GCN 37418).\nThe Fermi GBM on-ground location is consistent with the AstroSat and Fermi-LAT positions.\n\nThe angle from the Fermi LAT boresight is 25 degrees.\n\nThe GBM light curve single emission episode with a duration (T90)\nof about 1.3 s (50-300 keV). The time-averaged spectrum\nfrom T0+0 to T0+1.280 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.36 +/- 0.04 and the cutoff energy,\nparameterized as Epeak, is 1240 +/- 70 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(5.11 +/- 0.08)E-06 erg/cm^2. The 64-ms peak photon flux measured\nstarting from T0+0.32 s in the 10-1000 keV band is 30 +/- 1 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak= 1223 +/- 70 keV, alpha = -0.36 +/- 0.04 and beta = -4.16 +/- 1.24.\n\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/\"",
  "circularId": 37436,
  "subject": "GRB 240905B: Fermi GBM Observation",
  "submitter": "Sarah Dalessi at UAH <sd0104@uah.edu>",
  "format": "text/plain",
  "eventId": "GRB 240905B",
  "createdOn": 1725899353020
}