\begin{table}%t1
\caption{\label{tab:data1}Optical and infrared observations of EX~Lup collected from the literature, obtained in its quiescent periods.}
\small
%\centerline
{
\begin{tabular}{l l l c}
\hline \hline
 $\lambda$ [$\mu$m]    &Julian date & Magnitude  & Reference\\
\hline
0.36 ($U$) &2~443~349.545 &$14.21$ &1  \\
         &2~443~349.572 &$14.2$  &1  \\
         &2~443~349.681 &$14.23$ &1  \\
         &2~443~349.717 &$14.25$ &1  \\
         &2~443~349.728 &$14.28$ &1  \\
         &2~443~350.653 &$14.22$ &1  \\
         &2~443~353.659 &$14.13$ &1  \\
         &2~443~895.85  &$14.52$ &2  \\
\hline
0.44 ($B$) &2~443~349.545 &$14.33$ &1  \\
         &2~443~349.572 &$14.36$ &1  \\
         &2~443~349.681 &$14.24$ &1  \\
         &2~443~349.717 &$14.36$ &1  \\
         &2~443~349.728 &$14.33$ &1  \\
         &2~443~350.653 &$14.20$ &1  \\
         &2~443~353.659 &$14.07$ &1 \\
         &2~443~894.85  &$14.52$ &2  \\
         &2~443~895.85  &$14.42$ &2  \\
         &2~448~896     &$14.21$ &3  \\
\hline
0.55 ($V$) &2~443~349.545 &$13.13$ &1  \\
         &2~443~349.572 &$13.19$ &1  \\
         &2~443~349.681 &$13.27$ &1  \\
         &2~443~349.717 &$13.27$ &1  \\
         &2~443~349.728 &$13.21$ &1  \\
         &2~443~350.653 &$13.14$ &1  \\
         &2~443~353.659 &$13.22$ &1  \\
         &2~443~894.85  &$13.20$ &2  \\
         &2~443~895.85  &$13.22$ &2  \\
         &2~448~896     &$13.03$ &3  \\
\hline
0.64 ($R$) &2~448~896     &$12.15$ &3  \\
\hline
0.79 ($I$) &2~451~295.81  &$11.109$&4 \\
\hline
1.25 ($J$) &2~441~474     &$9.76$  &5  \\
1.25 ($J$) &2~445~075     &$9.92$  &6  \\
1.235($J$) &2~451~314.781 &$9.728$ &7  \\
1.221($J$) &2~451~295.81  &$9.92$  &4  \\
\hline
1.65 ($H$) &2~441~474     & $9.04$ &5  \\
1.65 ($H$) &2~445~075     &$9.11$  &6  \\
1.662($H$) &2~451~314.781 &$8.958$ &7  \\
\hline
2.2 ($K$)  &2~441~474     &$8.82$  &5 \\
2.2 ($K$)  & 2~445~075    &$8.78$  &6  \\
2.159 ($K_{\rm s}$)& 2~451~314.781&$8.496$ &7  \\
2.144 ($K_{\rm s}$)& 2~451~295.81 &$8.82$  &4 \\
\hline
3.4 ($L$) & 2~441~474     &$\ge$$8.7$&5  \\
3.4 ($L$) & 2~445~075     &$8.05$  &6  \\
\hline
4.8 ($M$) & 2~445~075     &$7.54$  &6  \\
\hline
\end{tabular}}
\smallskip
References: (1) \citet{ref:bastian_1979}; (2) \citet{ref:mundt_1980}; (3) \citet{ref:herbig_1992}; (4) The DENIS database (DENIS Consortium  2005); (5) \citet{ref:glass_1974}; (6) \citet{ref:hughes_1994}; (7) 2MASS All-Sky Catalog of Point Sources \citep{ref:cutri_2003}.
\end{table}