\begin{table}%t2
\caption{\label{tbl:radio_setup}Summary of the observational parameters.}
\par
%
\par
%\centerline
 {
\begin{tabular}{lc}
\hline
\hline
Parameter&   \\
\hline
Frequency ...................... &  4.86 GHz\\
Primary beam ................... & 4.4$^{\prime}$ \\
Synthesised beam$^a$ ................   & $\sim$1.5$^{\prime\prime}$ \\
Largest well imaged structure$^a$... & $\sim$20$^{\prime\prime}$ \\
Theoretical image rms  ........... & $\sim$0.14--0.19 mJy beam$^{-1}$\\
Typical image rms$^b$ ............... &  0.2 mJy beam$^{-1}$\\
Image pixel size  .............. &  0.3$^{\prime\prime}$ \\
\hline
\end{tabular}} 
\medskip
$^a$ Declination and hour angle dependent. 
\par
$^b$ The stated rms values have been estimated from emission free regions close to the centre of imaged fields. 
\end{table}