TITLE: GCN CIRCULAR NUMBER: 16714 SUBJECT: GRB 140818B: Fermi GBM detection DATE: 14/08/19 03:03:05 GMT FROM: Eric Burns at U of Alabama Eric Burns (UAH) reports on behalf of the Fermi GBM Team: "At 18:44:15.70 UT on 18 August 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 140818B (trigger 430080258 / 140818781). which was also detected by the Swift/BAT (Burrows et al. 2014, GCN 16709). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 32 degrees. The GBM light curve consists of one main peak followed by multiple smaller peaks with a duration (T90) of about 23.6 s (50-300 keV). The time-averaged spectrum from T0-6.14 s to T0+20.5 s is best fit by a simple power law function with index -1.7 +/- 0.1. The event fluence (10-1000 keV) in this time interval is (1.6 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.26 s in the 10-1000 keV band is 1.7 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."