\begin{table}%t2
%%\centering

\par
\caption{\label{tab_sel}Number of objects rejected per selection criteria.}                           \begin{tabular}{l| c c c c c c}          
\hline\hline                        
\multicolumn{7}{l}{First selection: SExtractor selection criteria}\\
\multicolumn{7}{l}{$N_{\rm in}=17767$, $N_{\rm out}=8081$, $N_{\rm rej,~tot}=9686$} \\
Sel. Criteria          & CLASS\_STAR~=~0.00 & Elong.$_{\rm SExt.}\geq2.5$ & $m_I\geq 27.5$ &  $m_V\geq 28.5$ & $FWHM_I\geq 12$ &$FWHM_V\geq 12$  \\
$N_{\rm rej}$              & 675              & 1652                    & 3251           &  3962           &  2452           & 3287            \\
\hline                                  
\multicolumn{7}{l}{Second selection: Ishape selection criteria}\\
\multicolumn{7}{l}{$N_{\rm in}=8081$, $N_{\rm out}=635$,  $N_{\rm rej,~tot}=7446$}      \\
Sel. Criteria          & 2$\sigma$\reff   & Elong.$_{\rm ish.}>2.0$    & $S/N< 30$ &   \reff~$\geq$~1.5 pc &  \reff~$\leq$~20 pc &   \\
$N_{\rm rej}$              & 1414             & 1293                   & 5051     &  5277                & 953                &   \\
\hline                                   % inserts single horizontal line
\multicolumn{7}{l}{Third selection: photometric selection criteria}\\
\multicolumn{7}{l}{$N_{\rm in}=635$, $N_{\rm out}=277$, $N_{\rm rej,~tot}=358$} \\
Sel. Criteria          & $\Delta (V-I)> 0.15$ &  vis. class $\geq$ 33 & $V-I \geq 1.5$ & $B-V \geq 1.2$ &   & \\
$N_{\rm rej}$              & 17                   & 286                 &   66           & 19             &   & \\
\hline                                            
\end{tabular} 
\end{table}