\begin{table}%t1
\caption{Some characteristics of several composite GRB spectra.\label{tab1}}
%\centerline
{
\begin{tabular}{clcccc}\hline\hline
\noalign{\smallskip}
GRB & $\epsilon_{\rm p}$ (MeV) & $\Gamma[\gamma_{\min}^2B]_{12}$ & $\Gamma[\gamma_{\min}^3/\rho]_{8}$ & $\Gamma[\gamma_{\min}^3/\bar{\rho}]_{8}$ & $n$\\[0.5ex]
\hline
930131 & $\sim $0.2 & 4.91 & 12.2 & 10.7 & $\sim $5.3\\
910503 & $\sim $1 & 17.8 & 8.9 & 8.14 & $\sim $4.3\\
910601 & $\sim $0.5 & 12.8 & 6.4 & 5.81 & $\sim $6.1\\
910814 & $\sim $2 & 44.7 & 50.0 & 45.0 & $\sim $5.2\\
\hline
\end{tabular}}
\medskip
$\epsilon_{\rm p}$ is the peak photon energy of the $\nu F_\nu$ spectral
distribution.\\
$[\gamma_{\min}^2 B]_{12} = \gamma_{\min}^2 B/10^{12}$.\\
$[\gamma_{\min}^3/\rho]_{8} = \gamma_{\min}^3/\rho/10^8$.\\
$\bar{\rho}$ is the expected value of $\rho$ with variance
$\sigma=\frac{1}{5}\bar{\rho}$ for Gaussian distribution of the
radius of curvature.\\
$n$ is the index of the distribution of electrons.\\
References: 930131: Bromm \& Schaefer (\cite{Bromm}); Meegan et~al. (\cite{Meegan}); Ryan et~al. (\cite{Ryan}); Kouveliotou (\cite{Kouveliotou}). \\
910503: Tavani (\cite{tavani:a}); Schaefer et~al.
(\cite{schaefer2}); Schaefer et~al. (\cite{Schaefer}). \\
910601: Tavani (\cite{tavani:a}); Schaefer et~al.
(\cite{Schaefer3}); Hanlon et~al. (\cite{Hanlon}); Shaefer et~al. (\cite{Schaefer}). \\
910814: Tavani (\cite{tavani:a}); Schaefer et~al.
(\cite{Schaefer3}); Hanlon et~al. (\cite{Hanlon}); Shaefer et~al.
(\cite{Schaefer}).
\end{table}