\begin{table}%t2
\caption{\label{simpar}Simulation parameters. $\Delta$RA and $\Delta$Dec are the displacements applied to the aimpoint or to the position of the neutron star in the second observation with respect to those in the first one.}
 %\centerline
 {\small
\begin{tabular}{lclccccc}
\hline\hline
Epoch  & Aimpoint    &$\Delta$RA    &$\Delta$Dec& Displacement &$\Delta$RA&$\Delta$Dec\\
     &         & offset   & aimpoint & aimpoint& target & target & target \\    
     &	       &  (pixel) &(arcsec) &(arcsec) & (arcsec) &(arcsec) &(arcsec)\\ 
\hline      
R1   & 	2002   &   Nominal   & 0.000 & 0.000 &&&\\
     &	2005   &   Nominal   & 0.000 & 0.000 & 1.00   &--0.707 &--0.707\\
R2$^{*}$   &	2002   &   Nominal   & 0.000 & 0.000 &&&\\
     &  2005   &   Nominal   & 0.000 & 0.000 & 1.00   &--0.707 &--0.707\\
R3   &  2002   &   0.25      &--0.123 & 0.000 &&&\\
     &  2005   &   0.25      &--0.123 & 0.000 & 1.00   &--0.707 &--0.707\\
R4   &  2002   &   0.50      & 0.000 &--0.246 &&&\\
     &  2005   &   0.50      & 0.000 &--0.246 & 1.00   &--0.707 &--0.707\\
R5   &  2002   &   0.67      & 0.232 & 0.232 &&&        \\
     &  2005   &   0.67      & 0.232 & 0.232 & 1.00   &--0.707 &--0.707\\
R6   &  2002   &   Nominal   & 0.000 & 0.000 &&&\\
     &  2005   &   Nominal   & 0.000 & 0.000 & 0.75   &--0.375 &--0.650\\
R7   &  2002   &   0.25      &--0.123 & 0.000 &&&\\
     &  2005   &   0.25      &--0.123 & 0.000 & 0.75   &--0.375 &--0.650\\
R8   &  2002   &   0.50      & 0.000 &--0.246 &&&\\
     &  2005   &   0.50      & 0.000 &--0.246 & 0.75   &--0.375 &--0.650\\
R9   &  2002   &   0.67      & 0.232 & 0.232 &&&\\
     &  2005   &   0.67      & 0.232 & 0.232 & 0.75   &--0.375 &--0.650\\
R10  &  2002   &   Nominal   & 0.000 & 0.000 &&&\\
     &  2005   &   Nominal   & 0.000 & 0.000 & 0.34   &+0.232 &+0.253\\
R11  &  2002   &   0.25      &--0.123 & 0.000 &&&\\
     &  2005   &   0.25      &--0.123 & 0.000 & 0.34   &+0.232 &+0.253\\
R12  &  2002   &   0.50      & 0.000 &--0.246 &&&\\
     &  2005   &   0.50      & 0.000 &--0.246 & 0.34   &+0.232 &+0.253\\
R13  &  2002   &   0.67      & 0.232 & 0.232 &&&\\
     &  2005   &   0.67      & 0.232 & 0.232 & 0.34   &+0.232 &+0.253\\
%R14  &  2002   &   Nominal   & 0.000 & 0.000 &&&\\
%     &  2005   &   Nominal   & 0.000 & 0.000 & 0.00   &+0.000 &+0.000\\
\hline
\end{tabular}}
\par
\smallskip%\medskip
$^{*}$ For this run, all source positions in the second epoch were offset by a fraction of an arcsecond (see text).
\par
\end{table}