\begin{table}%t6
\caption{\label{pixmesh}Construction of artificial images: dimensions and grid scales.}
%\centering
\par
\begin{tabular}{r c c c c c}    
\hline \hline \noalign{\smallskip}
 \multicolumn{1}{c}{} & \multicolumn{1}{c}{40 kpc} &
\multicolumn{1}{c}{60 kpc} & \multicolumn{1}{c}{80 kpc} &
\multicolumn{1}{c}{100 kpc} &
\multicolumn{1}{c}{200 kpc} \\
\hline \noalign{\smallskip}
50{\it gp}  & 0.8 {\footnotesize $\frac{{\rm kpc}}{gp}$} & 1.2 & 1.6 & 2.0 & 4.0 \\
100{\it gp} & 0.4 & 0.6 & 0.8 & 1.0 & 2.0 \\
200{\it gp} & 0.2 & 0.3 & 0.4 & 0.5 & 1.0 \\
500{\it gp} & 0.08& 0.12& 0.16& 0.2 & 0.4 \\
\hline
\end{tabular}
\end{table}