Fig. 4
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Visibility of the limb-darkened photosphere, best-fit ring model from the one-step approach, uniform circumstellar radiation from the two-step approach (Gaussian response function of MATISSE), and the calibrated MATISSE data dependent on the baseline at three representative wavelengths. Top: 3.06 μm (L band). Mid: 3.54 μm (L band). Bottom: 4.92 μm (M band, see Sect. 4.1 and Sect. 4.3 for details).
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