Radial velocities of λ And from STELLA+SES and VATT+PEPSI. In the upper panel, the orbital fit is plotted as a black line along with the data. STELLA+SES observations are indicated with dark blue circles; VATT+PEPSI observations are plotted in red triangles. In the lower panel the RV residuals are shown after removing the predicted orbital velocities. The thick grey line emphasizes the rotational modulation by applying a three-sinusoidal fit to the RV residuals.