GRB 241025C: Fermi GBM Detection

"At 15:36:10.66 UT on 25 October 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241025C (trigger 751563375/241025650). The GBM on-ground calculated location was reported in GCN Circular 37883. The angle from the Fermi LAT boresight is 75 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 5 s (50-300 keV). The time-averaged spectrum from T0-3.0 to T0+3.2 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.68 +/- 0.13 and the cutoff energy, parameterized as Epeak, is 103 +/- 7 keV. The event fluence (10-1000 keV) in this time interval is (1.71 +/- 0.08)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.26 s in the 10-1000 keV band is 9.7 +/- 0.3 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak = 102 +/- 10 keV, alpha = -0.68 +/- 0.15 and beta = -3.68 +/- 2.34. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"