\begin{table}%T1
 %\centering
\par
\caption{Reconstructed cluster mass within a cylinder of $340~
{h^{-1}}\mbox{ kpc}$ radius around the cluster centre from simulations
of mock catalogues resembling $I$-band ({\it left}) and $R$-band ({\it right}) weak
lensing data and one 4-image system.  Three different initial
conditions are used.  We use the best fit model from the multiple
image system {\it IM} (see Sect.~\ref{sc:mult}), the {\it IC} model
(NIS with same scaling and core radius as {\it IM}) and {\it I0} with
$\kappa^{(0)}=0$ on all grid points. In the last line the input mass
$M_{\rm s}$ from the simulation is given. The variance of the mass
estimate is given and in brackets we give for
comparison the velocity dispersion of an SIS having the same enclosed
mass within $340~ {h^{-1}}\mbox{ kpc}$.}
\label{tab:mass_sim}
\begin{tabular}{l c c  c c}
\noalign{\smallskip}
\hline
\hline
\noalign{\smallskip}
 & $M_{I,~\rm s}$& $[\sigma_{\rm I,~SIS}]$ &$M_{R,~\rm s}$& $[\sigma_{\rm R,~SIS}]$\\
&$[10^{15}~ M_{\odot}]$& $[{\rm km ~s^{-1}}]$& $[10^{15}~ M_{\odot}]$& $[{\rm km ~s^{-1}}]$\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
{\it IM} & $1.07 \pm 0.02$&[1720]&$1.04 \pm 0.02$ &[1710]\\
 {\it IC} & $1.04 \pm 0.02$&[1700]&$1.00 \pm 0.02$ &[1670]\\
 {\it I0} & $0.88 \pm 0.03$&[1560]&$0.82 \pm 0.03$ &[1510]\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\multicolumn{3}{c}{$M_{\rm s}({<}340~ {h^{-1}}\mbox{ kpc})$} & \multicolumn{1}{c}{0.99} &[1670]\\
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}