TITLE: GCN CIRCULAR NUMBER: 17257 SUBJECT: GRB 141230A: Fermi GBM detection DATE: 14/12/30 19:13:43 GMT FROM: Oliver Roberts at UCD/Fermi O.J. Roberts (UCD) reports on behalf of the Fermi GBM Team: "At 03:24:22.64 UT on the 30th of December 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 141230A (trigger 441602665 / 141230142 ). The GBM on-ground location, using the Fermi GBM trigger data, is RA = 57.0, Dec =+1.6, with an uncertainty of 3.3 degrees (radius, 1-sigma containment,statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees). The angle from the Fermi LAT boresight is about 120 degrees. The GBM light curve consists of a single FRED-like peak with a duration (T90) of about 9.9 s (50-300 keV). The time-averaged spectrum from T0+0.0 s to T0+5.1 s is well fit by a power law function with an an exponential high-energy cutoff. The power law index is -1.51 +/- 0.19 and the cutoff energy, parameterized as Epeak, is 75 +/- 16 keV. The event fluence (10-1000 keV) in this time interval is (1.2 +/- 0.1)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.1 s in the 10-1000 keV band is 8.4 +/- 0.4 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."