Asymmetry indicators as a function of time (panels on the left) and their corresponding GLS periodogram (panels on the right). From top to bottom: the bisector inverse span BIS, the FWHM of the CCF, the RV span, the ΔV and V_asy. Seasonal medians with the first and third quartiles are indicated in red. The rotational period of the star is indicated with a red vertical line. The 1% and 0.1% FAP levels are displayed as dashed and dotted horizontal lines, respectively. The extra power in the FWHM periodogram is due to a drift in the instrumental resolution, corrected in March 2014 (JD ≃ 2 456 370).