TITLE: GCN CIRCULAR NUMBER: 16512 SUBJECT: GRB 140703A: Fermi GBM detection DATE: 14/07/03 16:21:16 GMT FROM: Peter Jenke at MSFC P. Jenke (UAH) reports on behalf of the Fermi GBM Team: "At 00:37:07.19 UT on July 3 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140603A (trigger 426040630/140703026), which was also detected by Swift (D. Kocevski et al. 2014, GCN 16503). The GBM on-ground location, using the Fermi GBM trigger data, is consistent with the Swift/XRT location and the TELMA robotic telescope location (R. Cunniffe et al. 2014 GCN16504). The angle of the burst direction to the Fermi LAT boresight is 16 degrees. The GBM light curve consists of one main FRED-like peak near T0 and a late smaller peak at ~T0+70s with a duration (T90) of about 84s (50-300 keV). The time-averaged spectrum from T0-4s to T0+31s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -1.10 +/- 0.06 and the cutoff energy, parameterized as Epeak, is 177 +/- 14 keV. The event fluence (10-1000 keV) in this time interval is (7.4 +/- 0.4)E-07 ergs/cm^2. The 1.0-sec peak photon flux measured starting from T0+9.7s in the 10-1000 keV band is 4.1 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."