GCN Circular 17150
Eric Burns (UAH) report on behalf of the Fermi GBM Team: "At 19:11:21.10 UT on 07 December 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 141207A (trigger 439672284 / 141207800) which was also detected by Fermi LAT (Arimoto et al. 2014, GCN 17146) and observed by Swift (Evans 2014, GCN 17147). The GBM on-ground location is consistent with the LAT/Swift positions. The angle from the Fermi LAT boresight is 59 degrees. The GBM light curve consists of a single pulse with multiple spikes, with a duration (T90) of about 20 s (50-300 keV). The time-averaged spectrum from T0-0.768 s to T0+24.83 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -0.70 +/- 0.02 and the cutoff energy, parameterized as Epeak, is 1080 +/- 56 keV. The event fluence (10-1000 keV) in this time interval is (3.58 +/- 0.04)E-05 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+7.55 s in the 10-1000 keV band is 8.6 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."