\begin{table}%t4 
\caption{\label{tab:Halo}Radio halo parameters.}
%\centerline
{\small   
\begin{tabular}{cccc}
  \hline
Freq  & Beam &  Flux  & LLS  \\
~GHz  & $''\times''$ & mJy & Mpc\\
\hline
1.425 & $21\times 18$ & $118\pm 5$ &    1.5\\
4.860 & $18\times 14$ & $ 26\pm 1$ & 1.0 \\
0.325 & $84\times 54$ & $1.2\pm 0.5\times 10^3$ &1.8 \\
0.740& $80\times 80$  & $5.8\pm0.6\times10^3$& 1.3 \\
\hline
\end{tabular}}
\smallskip
Data at 74 and 325~MHz refer to the entire radio emission from the cluster, data at 1.425 and 4.860~GHz refer to the whole extended structure excluding only the contribution of the embedded sources.  
\end{table}