Fig. 3.
Examples of Voigt profile fits (blue: secondary, red: primary, light blue: DIBs, purple: combined fit) to the four observed He II lines (gray). Top panels: observation #2 taken around phase −0.25, bottom panels: observation #7 taken around phase 0.28. RV curves (blue: secondary, red: primary) obtained for the respective He II lines with the RV amplitudes are shown below. The black, dashed line in RV curve plots indicates the system velocity.
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