Left: visibility vs. spatial frequency for the continuum (black squares). The best fit to the total continuum emission (star+disc) is shown by the solid black line, the contribution of the star by the dashed line, and that of the disc by the dash-dotted line. Right: for comparison, we show the visibility at the peak of the 2–0 CO bandhead (filled red circles), the 3–1 CO bandhead (open red circles), and the 4–2 CO bandhead (red triangles). The black lines are the same as in the left panel.