\begin{table}%T3
\caption{\label{tab:tab3}CTTS properties.}
\small%\centerline
{
\begin{tabular}{lcrlrr}
\hline\hline\noalign{\smallskip}
Star      & \multicolumn{1}{c}{Stellar}         & \multicolumn{1}{c}{Age}   & \multicolumn{1}{c}{Ne/O} & \multicolumn{1}{c}{$T_{\rm med}^b$} & \multicolumn{1}{c}{$N_{\rm e}$} \\
          & \multicolumn{1}{c}{Association$^a$} & \multicolumn{1}{c}{(Myr)} &                          & \multicolumn{1}{c}{(MK)}              & \multicolumn{1}{c}{${\rm (10^{11}~cm^{-3})}$} \\
\noalign{\smallskip}\hline\noalign{\smallskip}
\object{BP~Tau}    & Taurus & 0.6$^c$  & 0.43$^d$ & 16.1$^d$             & 3.2$^d$$\hspace{1.5em}$     \\
\object{TW~Hya}    & TWA    & 8$^e$    & 0.87$^f$ &  4.8$^d$             & 21.1$^d$$\hspace{1.5em}$    \\
\object{V4046~Sgr} & BPMG   & 12$^g$   & 1.04$^h$ &  6.4$^h$             & 3.2$^h$$\hspace{1.5em}$     \\
\object{MP~Mus}    & LCC    & 17$^i$   & 0.46     &  8.5$\hspace{0.4em}$ & 5.0$\hspace{1.9em}$         \\
\hline
\end{tabular}}
\smallskip
$^a$~TWA = TW~Hydrae association, BPMG = $\beta$~Pictoris Moving Group, LCC = Lower Centaurus Curx; $^b$~$T_{\rm med}$ is derived as $(\Sigma_{i}EM_{i}~T_{i})/(\Sigma_{i}EM_{i})$; $^c$~\citet{GullbringHartman1998}; $^d$~\citet{RobradeSchmitt2006}; $^e$~\citet{MakarovFabricius2001}; $^f$~\citet{DrakeTesta2005b}; $^g$~\citet{ZuckermanSong2001}; $^h$~\citet[][ $T_{\rm med}$ has been derived from the line fluxes]{GuntherLiefke2006}; $^i$~\citet{MamajekMeyer2002}.
\end{table}