ART-XC 4–12 keV (top left) and 12–25 keV (top right) light curves; enlarged pre-eclipse part of the 4–12 keV light curve (center) and enlarged pre-eclipse part of the 12–25 keV light curve (bottom). Blue error bars correspond to 300 s data binning, pink lines correspond to the best fit of the model parameters (3), and green solid circles correspond to the orbital phase up to which the model describes the observed light curve (the beginning of X-ray eclipse ingress). Light green vertical lines mark specific eclipse phases: α indicates the beginning of the accretion disk eclipse, and γ indicates the neutron star eclipse. Dark green vertical lines mark the end of the corresponding eclipse phases. Red dashed vertical lines show specific orbital phases. Black error bars show the model residuals.