\begin{table}%t8
\caption{\label{SIEtab}SIE fit to the lensing system.}
\small%\centerline
 {
\begin{tabular}{ c  c  c }
\hline\hline
& SIE & SIE+$\gamma$\\
\hline
$\Delta x$ [\arcsec]&0.01&--0.007 $\pm$ 0.002\\
$\Delta y$ [\arcsec]&0.005&--0.005 $\pm$ 0.002\\
$\sigma$ [km~s$^{-1}$]&190.7&189.3 $\pm$ 0.4\\
\textit{e}&0.15 (fixed)&0.15 (fixed)\\
PA& 27.3$^{\circ}$ (fixed)& 27.3$^{\circ}$ (fixed)\\
$\gamma$&--&0.038 $\pm$ 0.002\\
 $\rm PA_{\gamma}$&--&107.4 $\pm$ 1.3\\
$\chi_\nu^2$&$\sim$100&0.3\\[2pt]
\hline
\end{tabular}}
\medskip
All observational constraints were fixed to the observed values. The galaxy's central position was allowed to move within~0.01\arcsec, which is the estimated uncertainty.
\end{table}