\begin{table}%t7
\caption{\label{tab_opt_ranges}Ranges in which the free parameters are allowed to vary
during the lens model optimization.}
\small%\centering
\par
\begin{tabular}{cc}
\hline\hline
\noalign{\smallskip}
Parameter & Opt. range    \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
X             &  $\pm$$6\arcsec$ from BCG center \\
Y             &  $\pm$$6\arcsec$ from BCG center\\
$\epsilon$    &  0--0.7 \\
$\theta$      &  0--180 deg\\
$\sigma_{0}$  &  900--1800~km~s$^{-1}$\\
$R_{\rm core}$    &  30--120 kpc\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
$\sigma_{0}^{\ast}$  & 120--140~km~s$^{-1}$\\
$R_{\rm cut}^{\ast}$     & 30--180 kpc \\
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}