TITLE: GCN CIRCULAR NUMBER: 13721 SUBJECT: GRB 120907A: Fermi GBM detection DATE: 12/09/07 15:27:07 GMT FROM: George A. Younes at USRA/NASA/MSFC George Younes (MSFC/USRA) reports on behalf of the Fermi GBM Team: "At 00:24:24.51 UT on 07 September 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 120907A (trigger 368670267 / 120907017) which was also detected by the Swift/BAT (Barthelmy et al. 2012, GCN 13716). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 110 degrees. The GBM light curve consists of a single pulse with a duration (T90) of about 5.8 s (50-300 keV). The time-averaged spectrum from T0-1.4 s to T0+0.7 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.75 +/- 0.25 and the cutoff energy, parameterized as Epeak, is 154.50 +/- 32.90 keV. The event fluence (10-1000 keV) in this time interval is (7.8 +/- 1.1)E-07 ergs/cm^2. The 1-sec peak photon flux measured starting from T0-1.1 s in the 10-1000 keV band is 4.3 +/- 0.4 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."