Fig. A.1
Color maps of high-pass-filtered (smooth-subtracted) adaptive optics images of the central 0.65′′× 0.65′′. The arrow points at the contour line excursions that are due to the flux density contribution of the DSO. The red asterisk indicates the position of Sgr A*. Left is 90° position angle for 2008 and right is 90° position angle for 2012.
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