Fermi Gamma-ray Space Telescope

The Fermi GBM GRB Time-Resolved Spectral Catalog: Brightest Bursts in the First Four Years

H.-F. Yu
R. D. Preece, J. Greiner, Fermi GBM Team

Abstract:

We present the first Fermi GBM GRB time-resolved spectral catalog. Time-resolved spectral analysis with high temporal and spectral resolution is performed to the brightest bursts observed by the Fermi GBM in its first 4 years of mission, in a wide gamma-ray energy range with high temporal and spectral resolution of 8 keV up to 40 MeV. This catalog covers the energies of a few hundred keV with high sensitivity where the spectral peaks or breaks usually reside, thus provides unique and crucial information about GRBs. We obtain 1,491 high spectrally and temporally resolved spectra from 81 bursts. The distributions of best-fit parameters, statistics of the parameter populations, parameter correlations, uncertainty correlations, spectral evolutionary trends of the peak energy, and identified blackbodies in the time-resolved spectra are presented in the catalog.