{
  "bibcode": "2024GCN.38257....1S",
  "format": "text/plain",
  "eventId": "GRB 241115C",
  "circularId": 38257,
  "subject": "GRB 241115C: Fermi GBM Observation",
  "createdOn": 1731793857355,
  "submittedHow": "web",
  "body": "L. Scotton (UAH), S. Dalessi (UAH) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 04:35:33.96 UT on 15 November 2024, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 241115C (trigger 753338138/241115191).\nwhich was also detected by Swift/BAT-GUANO (S. Ronchini et al. 2024, GCN 38245).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 257.26, Dec = 16.20 (J2000 degrees, equivalent to J2000 17h 9m, +16d 11'),\nwith a statistical uncertainty of 4.91 degrees. The Fermi GBM on-ground location \nis consistent with the Swift/BAT-NITRATES position.\n\nThe angle from the Fermi LAT boresight is 66 degrees.\n\nThe GBM light curve consists of a single emission episode with a duration (T90)\nof about 5.1 s (50-300 keV). The time-averaged spectrum\nfrom T0-1.0 to T0+7.0 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.77 +/- 0.08 and the cutoff energy,\nparameterized as Epeak, is 53 +/- 7 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.1 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+0.32 s in the 10-1000 keV band is 9.9 +/- 0.4 ph/s/cm^2.\n\nA Band function fits the spectrum equally well with\nEpeak = 51 +/- 7 keV, alpha = -1.72 +/- 0.11 and beta = -2.61 +/- 0.49.\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": "Lorenzo Scotton at UAH <lscottongcn@outlook.com>"
}