\begin{table}%T1
 %\centering
\par
 \caption{Estimation of the halo WD density based on the objects selected from the OHDHS sample.}
\par
% \begin{footnotesize}
\begin{tabular}{rcccccl} \hline\hline
\par
Confid. & \multicolumn{2}{c}{$\psi(V_{\alpha},V_{\delta})$} &
\multicolumn{2}{c}{$h(V_{\alpha},V_{\delta})$} &
\multicolumn{2}{c}{$t(V_{\alpha},V_{\delta}|r)$}\\
level & WDs & $\rho_{\rm WD}$ ($M_{\odot}$ pc$^{-3}$) & WDs &
$\rho_{\rm WD}$
($M_{\odot}$ pc$^{-3}$) & WDs & $\rho_{\rm WD}$ ($M_{\odot}$ pc$^{-3}$) \\
 \hline
99\% & 14  & $(2.0\pm 0.9)\times10^{-5}$ & 10 & $(1.6\pm 0.8)\times10^{-5}$ & 10 & $(1.5\pm0.8)\times10^{-5}$\\
%\hline
95\% & 20  & $(3.1\pm 1.0)\times10^{-5}$ & 12 & $(1.9\pm 0.9)\times10^{-5}$ & 13 & $(2.0 \pm0.9)\times10^{-5}$\\
\hline
\par
\end{tabular}
% \end{footnotesize}
 \label{tab:density}
\end{table}