\begin{table}%t4
\caption{The best-fit parameters for the four-image models.}
\label{table:4}
\small%\centerline
 {
\begin{tabular}{c c c c c c c c}
\hline\hline 
%&&&&&&& \\[-8pt]
Model & $\theta_{{\rm E}}$ & $x_{1_{l}}$ & $x_{2_{l}}$
& $e/\gamma$$^{{a}}$ & $\theta_{{\rm e}/\gamma}$$^{{a}}$ &
$\chi^{2} $ & d.o.f.$^{{c}}$\\ & (\arcsec) & (\arcsec) &
(\arcsec) & & (\degr) & & \\ 
\hline 
%&&&&&&& \\[-8pt]
SIE$^{{b}}$ & 1.91 & & & 0.486 & 28.3 & 14.3 & 3 \\ 
SIE & 2.55 & 0.15 & --0.17 & 0.699 & 28.1 & 1.77 & 1 \\ 
SIS+ES$^{{b}}$ & 1.22 & & & 0.198 & 29.1 & 6.70 & 3 \\ 
SIS+ES & 1.23 & 0.06 & 0.05 & 0.185 & 28.6 & 1.00 & 1 \\
\hline 
\end{tabular}}
\medskip
$^{{a}}$ Ellipticity or external shear values, depending on the model. \\
$^{{b}}$ The lens center is fixed to the galaxy center. \\
$^{{c}}$ Number of degrees of freedom.
\end{table}