Fig. 3
Fit of an elliptical ring model (blue dashed line) to the AMBER visibilities (red triangles) and the visibilities reported by Kraus et al. (2008a) (black dots). The blue dashed line represents an ellipse fit with the major axis a = 5.08 mas and minor axis b = 4.55 mas. For comparison we also applied a circular ring fit with the diameter d as a free parameter and obtained d = 4.63 mas.
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