Schematic illustration of the angle of view during the Kepler observation. The line marked with angle 0° points towards the giant or L₁. The other angles represent the beginning (−18.4°) and the middle (7.3°) in the Kepler observation. The inner disc edge is marked as a circle with an arrow showing the sense of rotation. The small circle represents the region where the inhomogeneity blobs may be originating (see text for details). ϕ denotes the orbital phase and corresponding viewing angle.