TITLE: GCN CIRCULAR NUMBER: 14235 SUBJECT: GRB 130216B: Fermi GBM observation DATE: 13/02/18 04:17:03 GMT FROM: Vandiver Chaplin at UAH/Fermi-GBM V.Chaplin (UAH) reports on behalf of the Fermi GBM Team: "At 18:58:11.70 UT on 16 Feb 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 130216B (trigger 382733894 / 130216790), which was also located in Swift/BAT ground analysis (Cummings 2013, GCN 14226). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 93 degrees. The GBM light curve shows a single pulse with a duration (T90) of about 15 s (50-300 keV). The time-averaged spectrum from T0-2.5 s to T0+6.8 s is fit by a power law function with an exponential high-energy cutoff. The power law index is -1.7 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 119 +/- 16 keV. The event fluence (10-1000 keV) in this time interval is (4.8 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.0 s in the 10-1000 keV band is 15.5 +/- 0.5 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 91 +/- 21 keV, alpha = -1.6 +/- 0.1 and beta = -2.2 +/- 0.2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."