\begin{table}%t1
   \caption{VLBI results.}
         \label{vlbi_maps}%\setlength{\tabcolsep}{3pt}
%\centerline
{\small%
         \begin{tabular}{@{}cc@{~}c@{~}cc@{~}c@{~}c@{~}c@{}}
            \hline \hline
            \noalign{\smallskip}
& \multicolumn{3}{c}{Image parameters$^{{a}}$} & \multicolumn{4}{c}{Model fit parameters$^{{b}}$}\\
            Epoch      &  Beam$^{{c}}$\ & $S_{\rm peak}^{{d}}$ & rms$^{{e}}$ & Comp.$^{{f}}$\ & $r^{{g}}$ & PA$^{h}$ & $S^{^{i}}$ \\
                       & {[($\rm mas\times mas$),$^\circ$]} & {[Jy/beam]} & {[mJy/beam]} &  & {[mas]} & { [$^\circ$]} & {[Jy/beam]} \\
            %\noalign{\smallskip}
            \hline
            %\noalign{\smallskip}
1995-07-28 & $(1.3 \times 0.5)$; $-5.2$ & $1.21$ & $0.3$ & Core & $0$ & -- & $1.186$ \\
           &                            &        &       & W1   & $0.2$ & $-97.4$ & $0.052$ \\
            %\noalign{\smallskip}
            \hline
            %\noalign{\smallskip}
2002-05-18 & $(1.3 \times 0.5)$; $-2.6$ & $1.09$ & $0.2$ & Core & $0$ & -- & $1.074$ \\
           &                            &        &       & N1   & $0.6$ & $-22.2$ & $0.110$ \\
           &                            &        &       & N2   & $2.1$ & $8.7$ & $0.012$ \\
           % \noalign{\smallskip}
            \hline
\noalign{\smallskip}
         \end{tabular}
}\medskip
\par
%\begin{scriptsize}
$^{{a}}$ The lowest contour is 1~mJy/beam in both images, contours increase by factors of $\sqrt{2}$; 
$^{{b}}$ formal uncertainties in the model fits are too small 
and therefore are not printed in the table;
$^{{c}}$ size and orientation of the restoring beam;
$^{{d}}$ peak flux density per beam area;
$^{{e}}$ noise level;
$^{{f}}$ individual Gaussian model-fit component;
$^{{g}}$ distance from core component;
$^{h}$ position angle of model-fit component;
$^{^{i}}$ flux density of model-fit component per beam area.
   \end{table}