\begin{table}%t4
%\centering
\par
\caption{\label{tab:cutoff}Results of fitting spectra of some \int\ GRBs with a cut-off power law model.}
\small \begin{tabular}{lccccccc}
\hline\hline\noalign{\smallskip}
\# & \textbf{Name} & \textbf{Fluence} & \multicolumn{4}{c}{Cut-off power law model} & \textbf{F-Test} \\
& & (20--200~keV) & \textbf{Photon index} & \textbf{Cutoff energy $E_0$} & $\mathbf{\chi^{2}_{\rm red}}$ & \textbf{d.o.f.} & probability  \\
& & [$10^{\rm -8}$~erg/cm$^2$]& &[keV] & & & \\
\hline\noalign{\smallskip}
2  &  021219 & $>$83.4 & $0.67^{\rm -0.30}_{+0.59}$ & $50^{\rm -11}_{+69}$ &  1.1 &    45 & $ 4 \times 10^{\rm -4}$ \\[3pt]
11 &  040323 &   189.9 & $0.44^{\rm -0.29}_{+0.26}$ & $120^{\rm -39}_{+84}$ &  1.3 &    45 & $ 2 \times 10^{\rm -4}$ \\[3pt]
13 &  040422 &    38.9 & $0.89^{\rm -0.44}_{+0.40}$ & $45^{\rm -13}_{+25}$ &  1.1 &    45 & $ 1 \times 10^{\rm -5}$ \\[3pt]
24 &  050502 &   101.2 & $0.86^{\rm -0.24}_{+0.22}$ & $91^{\rm -25}_{+47}$ &  1.0 &    45 & $ 3 \times 10^{\rm -6}$ \\[3pt]
25 &  050504 &   104.4 & $0.28^{\rm -0.48}_{+0.42}$ & $69^{\rm -24}_{+60}$ &  1.2 &    45 & $ 6 \times 10^{\rm -4}$ \\[3pt]
28 &  050525 &$>$1027.7& $1.30^{\rm -0.22}_{+0.21}$ & $83^{\rm -22}_{+40}$ &  1.2 &    38 & $ 2 \times 10^{\rm -6}$ \\[3pt]
38 & 060428C &   185.9 & $0.86^{\rm -0.20}_{+0.20}$ & $85^{\rm -19}_{+34}$ &  0.9 &    45 & $ 2 \times 10^{\rm -8}$ \\[3pt]
42 &  061025 &    88.9 & $0.41^{\rm -0.39}_{+0.35}$ & $66^{\rm -20}_{+40}$ &  1.1 &    45 & $ 1 \times 10^{\rm -5}$ \\[3pt]
43 &  061122 &   438.6 & $1.24^{\rm -0.16}_{+0.16}$ & $122^{\rm -31}_{+60}$ &  0.8 &	45 & $ 2 \times 10^{\rm -7}$ \\[3pt]
\hline
\end{tabular}
\end{table}