\begin{table}%t1
\par
%%%\centering

\par
\caption{Numerical simulations used in this study.\label{tab:sim}}
%%\centerline

{\begin{tabular}{lllcc}
  \hline
  \hline
  &&\multicolumn{3}{c}{Parameters}\\
  ID&Reference&RT$^{{a}}$&$\langle B_z \rangle$$^{{b}}$&hor. ext.$^{{c}}$
  \\
  &&&[G]&[Mm]\\
  \hline
  \multicolumn{4}{c}{CO$^5$BOLD simulations}\\
   \hline
   Ch0&Steffen (2007)              &non-gr.& 0&$11.2\times 11.2$\\
   Ch1&Wedemeyer et al. (2004)     &grey   & 0&$ 5.6\times 5.6$\\
   Ch2&Wedemeyer et al. (2004)     &non-gr.& 0&$ 5.6\times 5.6$\\
   Cm &Schaffenberger et al. (2006)&grey   &10&$ 4.8\times 4.8$\\
   \hline
   \multicolumn{4}{c}{Stein~\& Nordlund simulations}\\
   \hline
   SNh&Stein \& Nordlund (2006)&non-gr.&  0&$6.3 \times 6.3$\\
   SNm&Stein \& Nordlund (2006)&non-gr.&250&$6.3 \times 6.3$\\
  \hline 
  \end{tabular}}
  \medskip	
$^{{a}}$ For each model it is indicated if frequency-independent (``grey'') or 
    -dependent (``non-grey'') radiative transfer (RT) was considered.\\ 
$^{{b}}$ Magnetic field $\langle B_z \rangle$.\\
$^{{c}}$ Horizontal extent of the computational domain.
\end{table}