\begin{table}%t1
\caption{\label{tab:data}Summary of the most relevant observational quantities for \lname.}
\small%\centering
\par
\begin{tabular}[h!]{lcc}
\hline\hline
    Lens galaxy centre (J2000) & RA  & 02:17:37.136\\
                               & Dec  &--05:13:29.41 \\
\par
    Lens galaxy redshift        & $\zl$ &  $0.6459 \pm 0.0003$ \\
    Lens mags ($R<1\arcsec$)     &  $u^*$  & $23.90 \pm 0.20$\\
                                 &  $g'$  & $22.89 \pm 0.07$\\
                                 &  $r'$  & $21.74 \pm 0.05$\\
                                 &  $i'$  & $20.44 \pm 0.04$\\
                                 &  $z'$  & $20.12 \pm 0.03$\\
     HST (S\'ersic model mags)   &  {\it F606W}  & $ 20.90 \pm 0.05$\\
                                 &  {\it F814W}  & $ 19.71 \pm 0.01$\\
     Effective radius ({\it F814W})    &  $\Reff$  & $ 0\farcs90 \pm 0\farcs10 $ \\
                                 &         & $ 6.20 \pm 0.7 \hmkpc $ \\
     S\'ersic model index ({\it F814W})&   $n$     & $ 5.20$ \\
     Rest frame $V$ band luminosity& $L_V$   & $1.36\mypm{0.08}{0.08}  \times 10^{11} \hmlsun$\\
     light position angle ({\it F814W})&  PA$_*$  & $ 78\pm 6$ deg \\
     light ellipticity ({\it F814W})   &  $\epsilon_*$  & $ 0.14\pm 0.06 $ \\
     {\it ``Photometric''} stellar mass &  $M_*$ & $ 2.1-4.1 \times 10^{11}\msun$ \\
\hline
     Tangential arc &&\\
        $\ldots$  redshift  & $\zs$ & $1.8470 \pm 0.0003$\\
        $\ldots$            & ${\it F606W}_{\rm{arc}}$ & $22.04 \pm 0.16 $ \\
        $\ldots$            & ${\it F814W}_{\rm{arc}}$ & $22.19 \pm 0.13 $ \\
\hline
    Double system (R1) &&\\
        $\ldots$    photom. redshift& $\zrad$ &$\rm 2.90\mypm{0.18}{0.24}$ \\
        $\ldots$                    & ${\it F606W}_{\rm R1}$ & $24.11 \pm 0.06 $ \\
        $\ldots$                    & ${\it F814W}_{\rm R1}$ & $23.91 \pm 0.06 $ \\
\hline
    Einstein radius of the main arc& $R_{\rm arc}~~(\arcsec)$ & 1.4 \\
\hline
    Group redshift$^a$  &  $z_{\rm grp} $  & $0.648\pm0.001$ \\
    Group velocity dispersion$^a$  &  $\sigma_{\rm grp}^{\rm spec} $  & $770 \pm 170 \kms$ \\
    X-ray temperature$^a$ &  $ kT $  & $\rm 2.0\mypm{1.0}{0.6}$ keV \\
    $\sigma$ from $\sigma-T_{\rm X}$ relation$^a$  &  $\sigma_{\rm grp}^{\rm X}$  & $520 \pm 120 \kms$ \\
\hline
  \end{tabular}
\end{table}