\begin{table}%t2
%\centering
\par
\caption{The rms scatter for the integrated
RV measurements and detection limit of
an 11.6~min input sine-wave at a false alarm probability of
0.01.}\label{t2}
\begin{tabular}{ccc}
\hline\hline
Data Set & $\sigma_{\rm RV}$ & Detection Limit \\
 & m~s$^{-1}$  & m~s$^{-1}$  \\
\hline
 26 July 1997 &  8.3   & 5.5 \\
 11 August 1998 & 4.6  & 2.5 \\
 13 August 1998 & 4.8  & 2.5 \\
\hline
\end{tabular}
\end{table}