\begin{table}%t3
\caption{\label{tab3}Resolution and rms of the images used for the spectral index maps.}
%\centering
\par
\begin{tabular}{cccc}
\hline \hline \noalign{\smallskip}       
Name & $\nu$ & Resolution &rms\\
&MHz & \arcsec~$\times$~\arcsec & mJy/beam\\
\hline
3C 35&74&95 $\times$ 95&92.4\\
&327&95 $\times$ 95&7.0\\
&327&45 $\times$ 45&2.1\\
&1400&45 $\times$ 45&0.5\\
\hline
3C 223&74&26 $\times$ 26&43.6\\
&327&26 $\times$ 26&3.5\\
&327&7.5 $\times$ 7.5&0.7\\
&1480&7.5 $\times$ 7.5&0.1\\
\hline
\end{tabular}
\end{table}