Disentangled spectra of the artificial eclipsing binary. Panel a: phase dependent flux ratio has not been taken into account. As shown in the previous section, this introduces a slope to the disentangled spectra. Shown are the sharp-lined component A (purple) and B (green). Panel b: disentangled spectra with correct flux ratios used in comparison with the templates used to create the set of spectra. Template A and B are shifted by 0.1 and −0.1 on the y-axis for visibility. Panel c: as panel b, but with flux ratios from the optimization with start ratio of k = 1 for all phases.