Orbital phase-resolved spectra of the double-peaked sample fitted with a partial covering model, when significant (see text). Top panel (from top to bottom): data and folded model of the three spectra in phase bins X, Y, and Z. The spectra have been multiplied by the factor shown above each curve on the left side for better visualization. Bottom panel: residuals for the best-fit model. See Table 3 for all spectral parameters.