\begin{table}%t2
\caption{\label{tab:radio}Parameters of the radio images.}
%%\centerline

 {\small \begin{tabular}{lcc}
\hline\hline
Frequency & $HPBW$ & rms \\
 {GHz} & {$''$ (degree)} & {mJy/beam}\\
\hline
1.47  & $4.11 \times 1.21$ (--7) & 0.6  \\
15.11 & $0.6 \times 0.6$        & 0.25 \\
15.11 & $0.3 \times 0.3$        & 0.28 \\
\hline
\end{tabular}}
\medskip
Column~1: Observing frequency, Col.~2: HPBW and Position Angle of the major axis in degree; Col.~3: 1~rms level. 
\end{table}