\begin{table}%t6 \caption{\label{tab_constrains}Constraints for the new lens model of MS0451.} \small%\centerline { \begin{tabular}{ccclc} \hline\hline \noalign{\smallskip} Source name & ID & RA ($+4^{\rm h}$ $54^{\rm m}$) & Dec ($- 3^{\circ}$) & Band \\ & & J2000 (s) & J2000 ($\arcmin$,$\arcsec$) & \\ \noalign{\smallskip} \hline \noalign{\smallskip} & 1.1$^\ast$ & 12.956 & 0:53.379 & {\it F814W} \\ ARC1 & 1.2$^\ast$ & 12.931 & 0:58.029 & \\ & 1.3$^\ast$ & 11.124 & 1:26.641 & \\ \noalign{\smallskip} \hline \noalign{\smallskip} & 2.1 & 12.958 & 0:54.869 & {\it F814W} \\ ARC1 & 2.2 & 12.938 & 0:57.446 & \\ & 2.3 & 11.124 & 1:26.641 & \\ \noalign{\smallskip} \hline \noalign{\smallskip} & 3.1 & 12.958 & 0:55.147 & {\it F814W} \\ ARC1 & 3.2 & 12.945 & 0:56.710 & \\ & 3.3 & 11.124 & 1:26.641 & \\ \noalign{\smallskip} \hline \noalign{\smallskip} B1 & 4.1$^\ast$ & 12.806 & 0:44.344 & $K'$ band \\ B2 & 4.2$^\ast$ & 12.684 & 1:01.488 & \\ B3 & 4.3$^\ast$ & 10.927 & 1:24.795 & \\ \noalign{\smallskip} \hline \noalign{\smallskip} C1 & 5.1 & 12.822 & $0:47.834$ & $K'$ band \\ C2 & 5.2 & 12.747 & $0:59.481$ & \\ C3 & 5.3 & 10.897 & $1:25.627$ & \\ \noalign{\smallskip} \hline \noalign{\smallskip} RC1 & 6.1 & 12.890 & $0:53.907$ & 1.4~GHz \\ RC2 & 6.2 & 12.868 & $0:59.696$ & \\ \hline \end{tabular}} \smallskip Sources used as constraints in the lens model presented by \cite{BO04.1} are indicated with an asterisk in their ID number. \end{table}