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We aim to obtain high-quality time-resolved spectral fits of gamma-ray bursts(GRBs) observed by the Gamma-ray Burst Monitor (GBM) on board the FermiGamma-ray Space Telescope. We perform time-resolved spectral analysis with hightemporal and spectral resolution of the brightest bursts observed by Fermi GBMin its first 4 years of mission. We present the complete catalog containing1,491 spectra from 81 bursts with high spectral and temporal resolution.Distributions of parameters, statistics of the parameter populations,parameter-parameter and parameter-uncertainty correlations, and their exactvalues are obtained and presented as main results in this catalog. We report acriterion that is robust enough to automatically distinguish between differentspectral evolutionary trends between bursts. We also search for plausibleblackbody emission components and find that only 3 bursts (36 spectra in total)show evidence of a pure Planck function. It is observed that the averagedtime-resolved low-energy power-law index and peak energy are slightly harderthan the time-integrated values. Time-resolved spectroscopic results should beused when interpreting physics from the observed spectra, instead of thetime-integrated results.

The Fermi GBM gamma-ray burst time-resolved spectral catalog: brightest bursts in the first four years