TITLE: GCN CIRCULAR NUMBER: 14545 SUBJECT: GRB 130502A: Fermi GBM detection DATE: 13/05/03 17:11:22 GMT FROM: George A. Younes at USRA/NASA/MSFC G. Younes (NASA/USRA) reports on behalf of the Fermi GBM Team: "At 17:50:30.74 UT on May 2 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 130502A (trigger 389209833 / 130502743), which was also detected by the Swift/BAT (Troja et al. 2013, GCN 14527). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 20 degrees from Swift location. The GBM light curve consists of a single pulse with a FRED-like shape with a duration (T90) of about 3 s (50-300 keV). The time-averaged spectrum from T0-0.384 s to T0+2.880 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -1.0 +/- 0.3 and the cutoff energy, parameterized as Epeak, is 83 +/- 17 keV. The event fluence (10-1000 keV) in this time interval is (5.0 +/- 0.6)E-07 erg/cm^2. The 0.064-sec peak photon flux measured starting from T0-0.064 s in the 8-1000 keV band is 7 +/- 1 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."