\begin{table}%t3
\par
  \caption{Average contrast $\delta I_{\rm rms}$  and standard deviation of 
  the original and the deconvolved disc-centre observations in comparison with the 
  synthetic images.\label{tab:irmscomp}}
  %%\centerline

{
  \begin{tabular}{lrlrlrl}
  \hline
  \hline
  $\delta I_{\rm rms}$ &\multicolumn{6}{c}{$\lambda$}\\
  $[\%]$&\multicolumn{2}{c}{450.45~nm}&\multicolumn{2}{c}{555.00~nm}&\multicolumn{2}{c}{668.40~nm}  \\
  \hline
  \multicolumn{7}{c}{observation}\\
  \hline
  original     & 12.8&$\pm$0.5&  8.3&$\pm$0.4&  6.2&$\pm$0.2\\
  ideal PSF    & 18.0&$\pm$0.8& 12.3&$\pm$0.8&  9.9&$\pm$0.4\\
  full PSF     & 26.7&$\pm$1.3& 19.4&$\pm$1.4& 16.6&$\pm$0.7\\
  \hline
  \multicolumn{7}{c}{simulation Ch0 (Steffen 2007)$^{{a}}$}\\
  \hline
  original     & 25.0&$\pm$0.1&  18.1&$\pm$0.1&13.8    &$\pm$0.1   \\   
  ideal PSF    & 16.7&$\pm$0.3&  11.4&$\pm$0.2&8.2     &$\pm$0.2   \\   
  non-ideal PSF (1)&
                 13.0&$\pm$0.3&   8.6&$\pm$0.2&6.0     &$\pm$0.2   \\   
  non-ideal PSF (2)& 
11.3&$\pm$0.2&   7.4&$\pm$0.2&5.1     &$\pm$0.2   \\   
  \hline
  \multicolumn{7}{c}{other simulations (original)$^{{b}}$}\\
  \hline
   Ch1         & 25.8&$\pm$0.5&  19.0&$\pm$0.5&14.6  &$\pm$0.5 \\   
   Ch2         & 25.5&$\pm$0.5&  18.4&$\pm$0.5&13.9  &$\pm$0.5 \\   
   Cm          & 25.4&$\pm$0.1&  19.0&$\pm$0.5&14.7  &$\pm$0.1 \\
   SNh         & 25.2&$\pm$0.6&  18.4&$\pm$0.4&14.0  &$\pm$0.3 \\
   SNm         & 22.4&$\pm$0.5&  16.0&$\pm$0.3&12.3  &$\pm$0.2 \\
  \hline 
\end{tabular}}
\medskip
$^{{a}}$ The effect of the deconvolution with an ideal and a detailed PSF is specified for 
  the model by Steffen (Ch0). 
  The extent of the detailed PSF corresponds to 
  (1)~only the size of the model and 
  (2)~a periodic repetition of the model to a size of 
  110$\arcsec~\times~$110\arcsec, which is comparable to the FOV of the 
  observations.\\ 
$^{{\rm b}}$  For comparison, the original, i.e., non-degraded contrast values for sets of 
  \mbox{CO$^5$BOLD models}~(Ch1, Ch2, and Cm) and simulations by Stein~\& 
  Nordlund (SNh and SNm) are given. 
\end{table}