\begin{table}%t1
\center
\caption{\label{tb:mean}Mean values of the cluster physical properties of our cluster samples.}
\begin{tabular}{ccccc}
\hline \hline
  Sample         & $\sigma$ & $R_{200}$ & ${M}$$_{\rm vir}$        & $R_{\rm vir}$ \\
           & [$\kms$] & [$\mpc$]  & [$h^{-1}{M}$$_{\odot}$] &[$\mpc$]   \\
\hline
C-P04-I & $715$    & $1.77$    & $7\times10^{14}$      & $1.75$    \\
%\hline
C-K07-I & $675$    & $1.67$    & $6\times10^{14}$       & $1.59$    \\
\hline 
\end{tabular}
\end{table}