\begin{table}%t3
%\centering
\par
\caption{Selected reference stars and broadening  velocities.}
\label{refer}
\begin{tabular}{lllll}
\hline
\hline
Star   &   \multicolumn{4}{c}{$v \sin i$}    \\
         &    \multicolumn{4}{c}{(km~s$^{-1}$)}  \\
\hline
AP65  &  110 & & & \\
AP72  & 29 & 38 & & \\
AP98   & 29   & 38   &  50 & 170 \\
AP106  & 72  &  75 & & \\
AP110 & 25   &  50  &  170   &   \\
\hline
\end{tabular}
\end{table}