TITLE: GCN CIRCULAR NUMBER: 15866 SUBJECT: GRB 140219A: Fermi GBM Detection DATE: 14/02/20 19:08:45 GMT FROM: Binbin Zhang at UAH Bin-Bin Zhang (UAH) reports on behalf of the Fermi GBM Team: “At 19:46:32.24 UT on February 19 2014, the Fermi Gamma-Ray Burst Monitor triggered and located an extremely bright long GRB 140219A (trigger 414531995/140219824), which was also detected by INTEGRAL (SPI-ACS), Suzaku (WAM), Mars Odyssey (HEND) and MESSENGER (GRNS) (Holland et al., GCN 15825). The GBM on-ground location is consistent with IPN error box. The GRB position was occulted by the Earth during the brightest period of emission and only the weaker tail emission was observed by GBM. Using the available data we find that the GBM light curve consists of a multiple-peak structure with a duration of about 80 s (50-300 keV). The time-averaged spectrum from T0-2 s to T0+78 s is well fit with a power law function with an exponential high energy cutoff, which is parameterized as Epeak = 194 +/- 61 keV, alpha = -1.3 +/- 0.1. The event fluence (10-1000 keV) in this time interval is (4.9 +/- 0.6)E-06 erg/cm^2. The 1.0-sec peak photon flux measured starting from T0-0.9 s in the 10-1000 keV band is 3.2 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."