Periodogram of the Keplerian models with the parameters from Table 2. From top to bottom upper panel: 4.9 d, 11.4 d, 26 d, 96 d, and 172 d. The blue triangle indicates the rotation period at 96 d and its one-year alias at 79 d, the red triangles indicate the periods of the other signals (4.9 d, 11.4 d, 26 d, and 172 d). Lower panel: zoom into the long period range for the 96 d, and 172 d signals.