Fig. 1
Left: baselines and the corresponding (u,v) coverage of VLTI/AMBER observations of Altair, δ Aquilae, and Fomalhaut. Earth-rotation synthesis spanned over ~1.5 h/night for δ Aquilae and Altair and ~5 h/night for Fomalhaut. Right: same data for Achernar, where Earth-rotation synthesis spanned over ~5 h/night. Notice the rather dense sampling of the Fourier space for the target stars.
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