Equivalent width of Hα profile from gainer star during a complete orbital phase with donor contribution subtracted, using the CHIRON spectrograph (top). The dashed blue line corresponds to a Marquart-Levenberg fit using a fixed period 0.5P_o and the continuum green line represents a GLS fit with a free period, revealing a period of . violet and red intensities (V/R) ratio of Hα profile, measured from the continuum of the gainer star (center). Variations in the depth of absorption line of Hα measured in the gainer star (bottom).