\begin{table}%t5
\caption{\label{tab:detectivity}Tolerable exozodiacal dust density for different disc inclinations and wavelengths. }
 %\centerline
 {\small \begin{tabular}{c c c c c}
      \hline
      \hline
      Disc incl. & 8~$\mu$m & 10~$\mu$m & 16~$\mu$m & Wide \\
      \hline
      0$^\circ$ & 12.2 & 15.3 & 7.0 & 14.0 \\
      30$^\circ$ & 9.1 & 15.0 & 6.9 & 13.8 \\
      60$^\circ$ & 6.1 & 6.8 & 2.1 & 3.8 \\
      90$^\circ$ & 1.1 & 1.4 & 1.0 & 2.6 \\
      \hline
    \end{tabular}}
\medskip
The detection threshold is taken to be 5 times the rms deviation of the pixel counts within an annulus of width equal to the size of the PSF at half maximum.
\end{table}