\begin{table}%t4
\caption{\label{tab4}Final classification of the 1354 pre-selected variables.}
\small%\centering
\par
\begin{tabular}{llrr}
\hline\hline
Classification & Short description & Number & Inc. rate in RR1 \\
\hline
RR1--S    & Single-periodic overtone RR Lyrae & $712$ & $53.5$\% \\
RR1--BL1  & RR1 with one close component      & $46 $ & $3.5 $\% \\
RR1--BL2  & RR1 with symmetric frequencies    & $53 $ & $4.0 $\% \\
RR1--MC   & RR1 with more close components    & $13 $ & $1.0 $\% \\
RR1--PC   & RR1 with period change            & $187$ & $14.0$\% \\
RR1--D    & RR1 with frequencies at integer 
            $d^{-1}$                          & $137$ & $10.3$\% \\
RR1--MI   & RR1 with some miscellany          & $13 $ & $1.0$\% \\
\hline
RR01      & FU/FO double-mode RR Lyrae        & $165$ & $12.4$\% \\
RR01--BL1 &                                   & $1  $ & $0.1$\% \\
RR01--PC  &                                   & $5  $ & $0.4$\% \\
\hline
RR0--S    & Fundamental mode RR Lyrae         & $1  $ & $-$        \\
RR0--BL1  &                                   & $1  $ & $-$        \\
RR0--BL2  &                                   & $1  $ & $-$        \\
\hline
MDM       & Mysterious double-mode            & $3  $ & $-$        \\
BI        & Eclipsing binary                  & $16 $ & $-$        \\
\hline
\end{tabular}
\end{table}