TITLE: GCN CIRCULAR NUMBER: 16561 SUBJECT: GRB 140709B: Fermi GBM detection DATE: 14/07/10 03:08:23 GMT FROM: Binbin Zhang at UAH Bin-Bin Zhang (UAH) reports on behalf of the Fermi GBM Team: "At 15:17:52.85 UT on 09 July 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140709B (trigger 426611875 / 140709637) which was also detected by Swift (Swenson et al. 2014, GCN 16551). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/BAT location. The angle from the Fermi LAT boresight is 60 degrees. The GBM light curve consists of two main peaks with a total duration of about 150 s (50-300keV). The time-averaged spectrum from T0-132 s  to T0+15 s is well fit by a power law function with an exponential  high-energy cutoff. The power law index is -1.32 +/- 0.07 and the  cutoff energy, parameterized as Epeak, is 530 +/- 232 keV. The event fluence (10-1000 keV) in this time interval is (1.6 +/- 0.1)E-05 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0-1.28 s in the 10-1000 keV band is 1.9 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."