\begin{table}%t1
\caption{Fraction of positive detections obtained in our experiment.}\label{det_freq}
\par
%\centering
\small
\begin{tabular}{rrrcc|rrrcc}
 \hline \hline 
$R\mbox{~~}$ & $\sigma\mbox{~~~}$ & $P$ & $F_{\rm h}$ & $F_{\rm 3s}$ & $R\mbox{~~~}$ & $\sigma\mbox{~~~}$ & $P$ & $F_{\rm h}$ & $F_{\rm 3s}$ \\
  ($R_{\oplus}$) & (ppm) & (d) & & &  ($R_{\oplus}$) &  (ppm) & (d) & &        \\ 
\hline
1.0 & 100 & 5.0 & 0.93 & 0.36  &  1.75 & 100 & 5.0  &  1.00 & 1.00  \\
    &      & 10.0 & 0.31 & 0.03 &    &      & 10.0 &  1.00 &  1.00 \\
    &      & 25.0 & 0.01 & 0.00 &     &      & 25.0 &  1.00 &  1.00 \\
    &      & 50.0 & 0.00 & 0.00 &     &      & 50.0 &  0.88 & 0.77  \\
1.0 & 200  & 5.0 & 0.02 & 0.06 &  1.75 & 200 & 5.0  &  1.00 &  1.00 \\
    &      & 10.0 & 0.00 & 0.00 &     &      & 10.0 &  0.97 &  0.99 \\    
1.25 & 100 & 5.0  & 1.00  & 1.00&     &      & 25.0 &  0.27 &  0.60 \\
    &      & 10.0 & 0.98  & 0.77&     &      & 50.0 &  0.00 &  0.10 \\
    &      & 25.0 & 0.34  & 0.01& 1.75 & 300 & 5.0  &  0.95 &  0.99 \\
    &      & 50.0 & 0.01  & 0.01&     &      & 10.0 &  0.36 &  0.58 \\
1.25 & 200 & 5.0  & 0.46  & 0.61&     &      & 25.0 &  0.00 &  0.06 \\
    &      & 10.0 & 0.06  & 0.12&     &      & 50.0 &  0.00 &  0.00 \\
    &      & 25.0 & 0.00  & 0.02& 2.0 & 100 & 5.0  &  1.00  & 1.00   \\
    &      & 50.0 & 0.00  & 0.00&     &      & 10.0 & 1.00  & 1.00  \\
1.25 & 300 & 5.0  & 0.02  & 0.06&     &      & 25.0 & 1.00  & 1.00  \\
    &      & 10.0 & 0.00  & 0.01&     &      & 50.0 & 1.00  & 1.00  \\
    &      & 25.0 & 0.00  & 0.00& 2.0 & 200 & 5.0  &  1.00  & 1.00 \\ 
1.5 & 100 & 5.0  &  1.00 &  1.00&    &      & 10.0 & 1.00  & 1.00 \\
    &      & 10.0 & 1.00  & 1.00&    &      & 25.0 & 0.92  & 0.99  \\
    &      & 25.0 & 0.97  & 0.88&      &      & 50.0 & 0.09  & 0.57 \\
    &      & 50.0 & 0.16  & 0.06&  2.0 & 300 & 5.0  &  1.00  & 1.00  \\
1.5 & 200 & 5.0  &  0.99  & 1.00&      &      & 10.0 & 0.97  & 1.00  \\
    &      & 10.0 & 0.62  & 0.85&      &      & 25.0 & 0.08  & 0.42  \\
    &      & 25.0 & 0.00  & 0.10&      &      & 50.0 & 0.00  & 0.01 \\
    &      & 50.0 & 0.00  & 0.01&  2.0 &1000 & 5.0  &  0.00 & 0.01 \\
1.5 & 300 & 5.0  &  0.49  & 0.61&      &      & 10.0 & 0.00 & 0.00 \\
    &      & 10.0 & 0.02  & 0.17&  \\
    &      & 25.0 & 0.00  & 0.00&  \\      
\hline
\end{tabular}
\end{table}