\begin{table}%T3
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\caption{\label{table:3}Summary of data sets presented here.}             
     \small%\centering
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\begin{tabular}{c c c c c c c c c}     % 9 columns 
\hline\hline       \noalign{\smallskip}
                      &&\multicolumn{2}{c}{Data of 6--18} & \multicolumn{2}{c}{Data of 7--10} & \multicolumn{2}{c}{Data of 7--23}& Target\\
&&Star only or&Star and Planet&Star only or&Star and Planet&Star only or&Star and Planet\\
&&Planet only&&Planet only&&Planet only\\
\hline                    
A& Star &1&& 1&& 1\\
B& Two beam null&8.46 $\times$ 10$^{-6}$&& 7.39 $\times$ 10$^{-6}$&& 5.47 $\times$ 10$^{-6}$\\
C& Planet &3.80 $\times$ 10$^{-7}$ &&4.35 $\times$ 10$^{-7}$ &&4.35 $\times$ 10$^{-7}$\\
D& Planet measured& 4.03 $\times$ 10$^{-7}$ &3.66 $\times$ 10$^{-7}$& 4.12 $\times$ 10$^{-7}$& 4.39 $\times$ 10$^{-7}$& 3.91 $\times$ 10$^{-7}$& 4.08 $\times$ 10$^{-7}$\\
E&Planet rms measured&2.23 $\times$ 10$^{-7}$& 2.02 $\times$ 10$^{-7}$& 2.28 $\times$ 10$^{-7}$& 2.42$ \times$ 10$^{-7}$&2.16 $\times$ 10$^{-7}$& 2.25 $\times$ 10$^{-7}$\\ 
F&Noise rms measured&1.44 $\times$ 10$^{-8}$ &&1.48 $\times$ 10$^{-8}$ &&8.40 $\times$ 10$^{-9}$\\
G& Star to null & \multicolumn{2}{c}{118~269}&\multicolumn{2}{c}{135~395}&\multicolumn{2}{c}{182~660}& $\approx$100~000\\
H& Star to planet &\multicolumn{2}{c}{2~633~173}&\multicolumn{2}{c}{ 2~299~142}&\multicolumn{2}{c}{ 2~297~440}& $>$1~000~000\\
I& Null to planet &\multicolumn{2}{c}{22.3}&\multicolumn{2}{c}{17.0}&\multicolumn{2}{c}{ 12.6}& $>$10\\
J& Planet rms to noise &\multicolumn{2}{c}{14.0}&\multicolumn{2}{c}{ 16.4}&\multicolumn{2}{c}{ 26.9}& $>$10\\
K&Suppression below null&\multicolumn{2}{c}{293}&\multicolumn{2}{c}{250}&\multicolumn{2}{c}{326}& $>$100\\
\hline                  
\end{tabular}
\vspace*{2mm}
\end{table}