\begin{table}%t5 \caption{\label{spectral_indices}Measurement of spectral index for each burst.} %\centering \small \begin{tabular}{c c c} \hline \hline Burst & $\alpha$ & 1$\sigma$ error \\ number & ($S_{\nu}\propto{\nu}^{\alpha}$) & \\ \hline 1 & --9.9 & 6.7\\ 2 & --9.0 & 9.3 \\ 3 & 0.9 & 8.7 \\ 4 & --0.4 & 6.9\\ 5 & --12.3 & 6.9 \\ \hline \end{tabular} \end{table}