Top: Hα emission EW folded with the rotational period, demonstrating the double-wave character of the variation. The approximate continuum level corresponds to the null line. Points with no emission (from which useful RVs cannot be measured) are indicated by open circles. Bottom: RVs measured from the emission peaks of Hα and the RVs obtained from the Brγ line fitting, both folded with the rotational period. In both panels the black curve shows a harmonic fit to the ESPaDOnS data.