\begin{table}%t3
%\centering
\par
\caption{\label{tab:polerror}Allowed polarization errors ($\epsilon$) to reach a $10^5$ and $10^6$ rejection ratio for a three-beam multi-axial nulling interferometer depending on the numerical aperture.}
\small \begin{tabular}{ccc}
\hline\hline\noalign{\smallskip}
$NA_{\rm{eff}}$&$\epsilon (10^5)$&$\epsilon (10^6)$\\
\hline
0.06 & 0.009 & 0.002\\
0.1 & 0.007 & / \\
0.125 & 0.005 & / \\
0.2 & 0.001 & / \\
\hline
\end{tabular}
\end{table}