\begin{table}%t4!!!
\caption {\label{table2}Fit parameter $\ovl{\Delta}(r_1,r_2)$ (and $\Delta(r_1,r_2)$) for the expression Eq.~(\ref{simVV}), calculated as a least-squares approximation to $\ovl{V}(r_1=25~r_{\rm c}$). }
%\centering
\par
\begin{tabular}{ c c c c}
\hline\hline
$r_2=5~r_{\rm c}$& $r_2=10~r_{\rm c}$ & $r_2=25~r_{\rm c}$ & $r_2=50~r_{\rm c}$\\
\hline 
$0.096~(0.24)$  &$0.043~(0.17)$  &$0.032~(0.12)$  & $0.032~(0.10)$\\
\hline
\end{tabular}
\end{table}