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Fig. 3


Depth of the differential visibility curves for Rigel referenced to the uniform-disk diameter curve, corresponding to 2.76 mas. The AMBER measurements of the differential visibility obtained in the core of the line are indicated by triangles (20062007 campaign) and squares (20092010 campaign). A fit of theses values by two uniform-disk diameter curves provides with angular diameters of 3.58 ± 0.04 mas and 3.45 ± 0.04 mas, for 20062007 and 20092010, respectively.

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