\begin{table}%T3
\caption{Summary of the results obtained in the case where the magnitude
         difference between the two stars is zero -- interferometric case.
         Sep. is the minimum separation obtained in units of 
         $\lambda/B$, where $B$ is the maximum baseline of LBT.
         \label{tab:3}}
%\centering
\par
\begin{tabular}{cccc} 
\hline\hline
main star  & Case \textbf{A}    & Case \textbf{B}    & Case \textbf{C}    \\
$K$-band mag.& Sep. [$\lambda/B$] & Sep. [$\lambda/B$] & Sep. [$\lambda/B$] \\ \hline
10       & 3/20               & 3/20               & 3/20               \\ %\hline
11       & 3/20               & 3/20               & 1/5                \\ %\hline
12       & 3/20               & 3/20               & 1/4                \\ %\hline
13       & 3/20               & 3/20               & 1/4                \\ %\hline
14       & 3/20               & 1/4                & 1/4                \\ %\hline
15       & 3/20               & 1/4                & 1/4                \\ %\hline
16       & 1/5                & 1/4                & 1/4                \\ %\hline
17       & 1/5                & 1/4                & 1/4                \\ \hline
\end{tabular}
\end{table}