\begin{table}%t6 \caption{\label{astgalfit}Astrometry obtained with \textsc{galfit} for the background source images. All quoted values are in arcseconds with respect to the lensing galaxy at RA~= 09$^{\rm h}$59$^{\rm min}$21.768$^{\rm s}$, Dec~= +02$^\circ$06\arcmin38.33\arcsec.} %\centering \small \begin{tabular}{c c c c c c} \hline\hline Filter &&A & B &C &D\\ \hline \multirow{4}{*}{{\it F814W}}&$\Delta_{\rm RA}$&0.702&0.617&--0.067&--0.468\\ &&($\pm$0.005)&($\pm$0.003)&($\pm$0.003)&($\pm$0.008)\\ &$\Delta_{\rm Dec}$&--0.132&0.382&0.727&--0.507\\ &&($\pm$0.005)&($\pm$0.002)&($\pm$0.002)&($\pm$0.008)\\ \hline \end{tabular} \end{table}