\begin{table}%t1
%\centering
\par
\caption{\label{lsq}Summary of the frequency detection.}
\begin{tabular}{rcc rr}
\hline \hline
\noalign{\smallskip}
\multicolumn{1}{c}{Detected} & \multicolumn{1}{c}{Amplitude}&
\multicolumn{1}{c}{Residual rms} & \multicolumn{1}{c}{{\it SNR}} & \multicolumn{1}{c}{sig} \\
\multicolumn{1}{c}{frequencies}& \multicolumn{2}{c}{[mmag]}\\
\hline
0    &  \multicolumn{1}{c}{--}    & 13.63 & \multicolumn{1}{c}{--}    & \multicolumn{1}{c}{--}    \\
1    & 15.45  & 8.14  & 2060.5 &  4526.4      \\
20   &  0.64  & 2.85  &   85.5 &  175.6  \\
60   &  0.28  & 2.03  &   37.4 &   66.3  \\
100  &  0.20  & 1.74 &    26.7 &  46.9   \\
200  &  0.12  & 1.34 &    16.0 &  29.7 \\
300  &  0.09  & 1.11 &    12.0 &  23.4 \\
500  &  0.06  & 0.83 &     8.0 &  18.3 \\
750  &  0.04  & 0.61 &     5.3 &  15.7 \\
1000  & 0.03  & 0.48 &     4.0 & 12.6 \\
\hline
\end{tabular}
\end{table}