\begin{table}%t4
\caption{\label{tab:evpa8}The results of the 8~GHz VLBA observations.}
%\centerline
 {\small \begin{tabular}{cccccccc}
\hline \hline 
Epoch & \multicolumn{3}{c}{Core} & \multicolumn{3}{c}{Jet} & \\
& $I_{\rm c}$ [mJy] & $P_{\rm c}$ [mJy] & $\chi_{\rm c} [^\circ]$ & $I_{\rm j}$ [mJy] & $P_{\rm j}$ [mJy] & $\chi_{\rm j} [^\circ]$ & $\vert \chi_{\rm c}-\chi_{\rm j} \vert [^\circ]$ \\
\noalign {\smallskip}\hline
2007.540 & $285 \pm 10$ & $2.0 \pm 0.2$ & $12 \pm 17$ & $75 \pm 21$ & $1.7 \pm 0.1$ & $87 \pm 17$ & $75$ \\
2007.661 & $264 \pm 10$ & $3.8 \pm 0.4$ & $-23 \pm 21$ & $81 \pm 8$ & $1.2 \pm 0.2$ & $96 \pm 21$ & $119$ \\
2007.773 & $252 \pm 4$ & $4.8 \pm 0.1$ & $-56 \pm 4$ & $93 \pm 6$ & $1.2 \pm 0.2$ & $80 \pm 4$ & $136$ \\
2007.907 & $264 \pm 10$ & $4.1 \pm 0.2$ & $-41 \pm 3$ & $84 \pm 6$ & $1.0 \pm 0.2$ & $82 \pm 15$ & $123$ \\
2008.025& $256 \pm 3$ & $4.7 \pm 0.3$ & $-20 \pm 4$ & $89 \pm 5$ & $1.1 \pm 0.1$ & $83 \pm 3$ & $103$ \\
2008.137 & $264 \pm 10$ & $4.5 \pm 0.1$ & $-9 \pm 4$ & $75 \pm 10$ & $1.0 \pm 0.1$ & $92 \pm 3$ & $101$ \\
\hline
\end{tabular}}
\medskip
The columns are the same as in Table~\ref{tab:evpa5}. 
\end{table}