Binned spectra of 1995 at four (sidereal) orbital phases. Low mass companion approaching (ϕ_S = 0.2–0.3; blue) and receding (ϕ_s = 0.7–0.8; red). These spectra are shifted vertically for clarity in the figure. The spectra corresponding to conjunctions are at ϕ_S = 0.9–1.1 (WR in front, magenta) and ϕ_S = 0.4–0.6 (green). Each panel illustrates a different wavelength region. The horizontal lines enclose wavelength regions defining bands that were used for flux measurements.