\begin{table}%t3
\caption{\label{tab:wamps}Amplitudes and $1\sigma$ errors of the double power-law correlation function 
$w(\theta)=B\theta^{-3.4}+A\theta^{0.8}$ as a function of flux density limit.}
%\centering
\par
\begin{tabular}[t]{lllll}
\hline
\hline\noalign{\smallskip}
$S_{\rm lim}$ & \multicolumn{2}{c}{NVSS} & \multicolumn{2}{c}{FIRST}\\
\noalign{\smallskip}\hline\noalign{\smallskip}
        & $10^6\times B$ & $10^3\times A$ & $10^6\times B$ & $10^3\times A$\\
\noalign{\smallskip}\hline\noalign{\smallskip}
3 mJy   & $0.7\pm0.1$ & $0.8\pm0.1$   &  $0.7\pm0.1$  &  $1.2\pm0.1$\\ 
5 mJy   & $1.0\pm0.1$ & $1.0\pm0.1$   &  $1.0\pm0.1$  &  $1.4\pm0.2$\\
7 mJy   & $1.2\pm0.1$ & $0.9\pm0.2$   &  $1.2\pm0.1$  &  $1.3\pm0.3$\\
10 mJy  & $1.5\pm0.1$ & $1.0\pm0.2$   &  $1.4\pm0.1$  &  $1.9\pm0.3$\\
20 mJy  & $2.6\pm0.2$ & $0.9\pm0.2$   & \multicolumn{2}{c}{--}\\
30 mJy  & $4.1\pm0.1$ & $1.0\pm0.2$   & \multicolumn{2}{c}{--}\\
40 mJy  & $4.4\pm0.1$ & $1.3\pm0.5$   & \multicolumn{2}{c}{--}\\
50 mJy  & $8.3\pm0.2$ & $1.9\pm0.8$   & \multicolumn{2}{c}{--}\\
60 mJy  & $6.8\pm3.0$ & $1.7\pm0.4$   & \multicolumn{2}{c}{--}\\
80 mJy  & $8.4\pm0.2$ & $1.9\pm0.7$   & \multicolumn{2}{c}{--}\\
100 mJy & $19\pm1$ & $2.2\pm0.7$   & \multicolumn{2}{c}{--}\\
200 mJy & $30\pm1$ & $6.6\pm1.8$   & \multicolumn{2}{c}{--}\\
\hline
\end{tabular}
\end{table}