\begin{table}%t2
\setlength{\tabcolsep}{4pt}
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\par
\caption{Restoration errors of the reconstructions using the galaxy test object
shown in Fig.~\ref{fig:ngc3504_rec} (see also Table~\ref{tab:compsim1_param})
with total magnitudes of $J=16.0^{\rm m}$, $J=17.0^{\rm m}$, and $J=18.0^{\rm m}$.
The restoration errors listed are averages of 10 statistically independent LBT data sets (see text).\label{tab:results1}}
\begin{tabular}{llll} \hline \hline
$J$ magnitude     & RL                  & OSEM                & BB \\ \hline
16.0 	        & $4.29\pm0.14$\%     & $4.81\pm0.10$\%     & $4.09\pm0.14$\% \\  
17.0 	        & $5.41\pm0.10$\%     & $5.58\pm0.08$\%     & $5.30\pm0.10$\% \\ 
18.0 	        & $7.38\pm0.22$\%     & $7.63\pm0.16$\%     & $7.43\pm0.22$\% \\ \hline
 \end{tabular}
\end{table}