\begin{table}%T4
\par
\caption{\label{Tab4}Photometry on GQ~Lupi~with VLT/NACO.}
\small%\centerline
{
\begin{tabular}{lcccc}
  \hline\hline
Epoch   & Diff. (a) & \multicolumn{3}{c}{$K_{\rm s}$ band~magnitude [mag]} \\ 
year    & HIP~A--B & GQ~Lupi~A & GQ~Lupi~b & cc2 (b) \\
 \hline
2005.40 & $1.56 \pm 0.07$ & $7.07 \pm 0.07$ & $13.46 \pm 0.12$ & $14.80 \pm 0.24$ \\
2005.60 & $1.46 \pm 0.13$ & $7.04 \pm 0.14$ & $13.34 \pm 0.42$ & $14.78 \pm 0.18$ \\
2006.14 & $1.57 \pm 0.08$ & $7.09 \pm 0.08$ & $13.38 \pm 0.10$ & $14.88 \pm 0.16$ \\
2006.38 & $1.59 \pm 0.07$ & $7.40 \pm 0.08$ & $13.47 \pm 0.14$ & $14.87 \pm 0.26$ \\
2006.54 & $1.66 \pm 0.12$ & $7.02 \pm 0.13$ & $13.45 \pm 0.38$ & $15.07 \pm 0.34$ \\
2007.13 & $1.54 \pm 0.16$ & $7.48 \pm 0.16$ & $13.27 \pm 0.12$ & $15.67 \pm 0.92$ \\
 \hline
mean    & $1.56 \pm 0.07$ & $7.18 \pm 0.20$ & $13.39 \pm 0.08$ & $15.01 \pm 0.33$ \\ 
\hline
\end{tabular}}
\smallskip
Remarks: (a) difference in $K_{\rm s}$ between HIP~73357 A and B.
(b) background object GQ~Lupi/cc2.
\end{table}