  Sorted by the photon fluences of short Gamma-ray Bursts (SGRBs) detected by
the Fermi- Gamma Ray Burst Monitor (GBM), nine brightest bursts are selected to
perform a comprehensive analysis. All GRB lightcurves are fitted well by 1 to 3
pulses that are modelled by fast-rising exponential decay profile (FRED),
within which the resultant rising time is strongly positive-correlated with the
full time width at half maxima (FWHM). A photon spectral model involving a
cutoff power-law function and a standard blackbody function (CPL + BB) could
reproduce the spectral energy distributions of these SGRBs well in the bursting
phase. The CPL's peak energy is found strongly positive-correlated with the
BB's temperature, which indicates they might be from the same physical origin.
Possible physical origins are discussed to account for these correlations.
