Projections of the models. Silhouettes of the best-fit convex (blue) and nonconvex (magenta) shape models are shown for four occultations. The chords are shown as solid lines with gray timing error bars at their ends. The dotted straight lines in the first panel are negative observations. The red line gives the time scale, which is one second long. The last panel shows the prediction of the silhouette for the Betelgeuse occultation.