\begin{table}%t2
\caption{Errors on the ellipticity and position angles of the bulge
  and disk calculated for galaxies with nuclear bars by means of Monte
  Carlo simulations.}
\label{tab:error_bar}  
%%\centering
\par
\small
\begin{tabular}{c c c} 
\hline\hline 
Parameter & Mean & St. Dev.\\ 
\hline 
$\Delta q_{\rm b}$ & 0.02 & 0.03 \\ 
$\Delta q_{\rm d}$ & 0.005 & 0.02 \\ 
$\Delta$PA$_{\rm b}\ (^\circ)$ & 0.3 & 7  \\ 
$\Delta$PA$_{\rm d}\ (^\circ)$ & 0.1 & 3  \\ 
\hline 
\end{tabular}  
\begin{scriptsize} 
\end{scriptsize} 
\end{table}