GCN Circular 32918
R. Dunwoody (UCD), R. Hamburg (UAH) and C. Meegan (UAH), report on behalf of the Fermi GBM Team: "At 01:22:52.46 UT on 07 November 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221107A (trigger 689476977 / 221107058. This event was also observed by Swift/BAT-GUANO (GCN 32915) and GRBAlpha (GCN 32917). The GBM position is reported in the Fermi-GBM Final on-ground Localization (GCN 32913). The angle from the Fermi LAT boresight is 54 degrees. The GBM light curve shows numerous peaks with a duration (T90) of about 231 s (50-300 keV). The time-averaged spectrum from T0-2 to T0+235 s is best fit by a Band function with Epeak = 47 +/- 2 keV, alpha = 0.32 +/- 0.17, and beta = -2.00 +/- 0.02. The event fluence (10-1000 keV) in this time interval is (7.464 +/- 0.261)E-05 erg/cm2. The 1-sec peak photon flux measured starting from T0+9.5 s in the 10-1000 keV band is 10.3 +/- 0.4 ph/s/cm2. 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/"