LS periodogram of v_span (SOPHIE 2012: upper panel, 2018: lower panel), including the window function of the dataset. The rotational frequency of the star (1.492 d⁻¹, for a period of 0.670 d), as well as its harmonics, are indicated by vertical bars with a height of 0.3. The lower bars at 0.15 and 0.02 height indicate the position of the ±1 and 2–day aliases, respectively, generated by the window function.