GCN Circular 15565
Andrew C. Collazzi (NASA/ORAU) reports on behalf of the Fermi GBM Team: "At 15:12:10.85 UT on 2 December 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 131202A (trigger 407689933 / 131202633), which was also detected by the Swift/BAT and Swift/XRT (Kocevski et al., GCN 15559). The GBM on-ground location is consistent with the Swift/XRT position. The angle from the Fermi LAT boresight is 86 degrees. The GBM light curve consists of a single pulse with a duration (T90) of 26 s (50-300 keV). We find the 1.024-s peak flux (10 - 1000 keV), measured starting from T0-2.560, to be 1.5 +/- 0.2 ph/(s cm^2). The time-averaged spectrum from T0-8.2 s to T0+11.3 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.10 +/- 0.25 and the cutoff energy, parameterized as Epeak, is 288.4 +/- 172.0 keV. The event fluence (10-1000 keV) in this time interval is (1.6 +/- 0.4)E-06 erg/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."