Table 3: Average position and flux of Sgr A* as obtained from the NIR data. The first column lists the observation ID (see Table 1), second and third columns the position of Sgr A* (average of all exposures) relative to its nominal position (Eisenhauer et al. 2003), 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.
Observing $\lambda $ RA [''] Dec [''] Flux [mJy]
ID        
1 1.7 $\mu $m 0.004$\;\pm\;$0.004 0.009$\;\pm\;$0.005 $\le$3.1
2 2.2 $\mu $m 0.011$\;\pm\;$0.007 0.012$\;\pm\;$0.013 $\le$3.9
3 3.8 $\mu $m 0.017$\;\pm\;$0.009 -0.017$\;\pm\;$0.004 $\le$34
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


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