\begin{table}%T3
\setlength{\tabcolsep}{3pt}
%\centering
\par
\caption{Average position and flux of Sgr~A* as obtained from the NIR data.
The first column lists the observation ID (see Table~\ref{log}), second
and third columns the position of Sgr~A* (average of all exposures)
relative to its nominal position (Eisenhauer et~al. \cite{Eisenhauer03}), and the
fourth column the measured overall flux and standard deviation of Sgr~A*
during the particular observing session. The
data were obtained by aperture measurements with a $\sim$50~mas
radius circular aperture on the nominal position of Sgr~A*. The flux
measurements were corrected for extinction (see text). For data set~2,
the average values are extracted from the first 120 exposures because
the exposures obtained later were of very low quality.
\label{SgrAdata}}
\begin{tabular}{ccccc}
\hline\hline
Observing & $\lambda$ & RA [$''$] & Dec [$''$] & Flux [mJy] \\
ID & & & &  \\
\hline
1 & 1.7~$\mu$m & 0.004$\;\pm\;$0.004 & 0.009$\;\pm\;$0.005 & $\le$3.1 \\ % 2.6$\;\pm\;$0.5 \\ 
2 & 2.2~$\mu$m & 0.011$\;\pm\;$0.007 & 0.012$\;\pm\;$0.013 & $\le$3.9 \\ % 3.2$\;\pm\;$0.7 \\ 
3 & 3.8~$\mu$m & 0.017$\;\pm\;$0.009 & --0.017$\;\pm\;$0.004 &$\le$34  \\ % 23$\;\pm\;$11 \\ 
4 & 2.2~$\mu$m & 0.004$\;\pm\;$0.003 & 0.005$\;\pm\;$0.004 & 5.2$\;\pm\;$1.8 \\ 
5 & 3.8~$\mu$m & --0.022$\;\pm\;$0.004 & --0.009$\;\pm\;$0.005 & 17$\;\pm\;$4 \\ 
6 & 2.2~$\mu$m  & 0.003$\;\pm\;$0.004 & 0.002$\;\pm\;$0.003 & 2.8$\;\pm\;$1.1 \\ 
\hline
\end{tabular}
\end{table}