\begin{table}%t3 \caption{\label{tab:naco_observations}Summary of the VLT/NACO photometry in the \Ks~band obtained between 2001~December and 2009~October.} %%\centering \par \begin{tabular}{ r @{} c @{} rcc } \hline\hline \noalign{\smallskip} \multicolumn{3}{c}{Date} & $\Delta K_{\rm S}$ (Sa-N) & $\Delta K_{\rm S}$ (Sb-N) \\ \hline 2001 & \ \ Dec. \ \ & 8 & 1.67 $\pm$ 0.05 & 3.02 $\pm$ 0.02 \\ 2002 & \ \ Dec. \ \ & 15 & 3.61 $\pm$ 0.05 & 3.14 $\pm$ 0.02 \\ 2003 & \ \ Dec. \ \ & 12 & 4.75 $\pm$ 0.05 & 3.25 $\pm$ 0.02 \\ 2004 & \ \ Dec. \ \ & 9 & 4.79 $\pm$ 0.05 & 3.31 $\pm$ 0.02 \\ 2006 & \ \ Oct. \ \ & 11 & 3.14 $\pm$ 0.05 & 2.94 $\pm$ 0.02 \\ 2007 & \ \ Sep. \ \ & 16 & 3.09 $\pm$ 0.05 & 2.92 $\pm$ 0.02 \\ 2008 & \ \ Feb. \ \ & 1 & 3.07 $\pm$ 0.05 & 3.05 $\pm$ 0.02 \\ 2008 & \ \ Oct. \ \ & 17 & 3.46 $\pm$ 0.05 & 3.07 $\pm$ 0.02 \\ 2008 & \ \ Nov. \ \ & 6 & 3.84 $\pm$ 0.05 & 2.88 $\pm$ 0.02 \\ 2009 & \ \ Feb. \ \ & 18 & 3.45 $\pm$ 0.05 & 2.88 $\pm$ 0.02 \\ 2009 & \ \ Oct. \ \ & 7 & 3.05 $\pm$ 0.05 & 3.07 $\pm$ 0.02 \\ \hline \end{tabular} \tablefoot {All magnitudes are relative to T~Tau~N.} \vspace*{5mm} \end{table}