Fig. 4

AMBER observation of HD 98922 at spectral resolution of R = 12 000 (28 Feb. 2013). From top to bottom: wavelength dependence of flux, visibilities, wavelength-differential phases, and closure phase observed at three different projected baselines (see labels in figure). For clarity, the differential phases of the first and last baselines are shifted by +30° and −30°, respectively.
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