Top: ART-XC 4–12 keV light curve of Her X-1 divided into 40 equal time intervals. Green lines mark the specific eclipse phases: γ = 0.07 is the opening of the neutron star by the optical star, and α = 0.13 is the opening of the entire accretion disk by the optical star (see text). Bottom: Dependence of the χ² value of the deviations of the count rate in the X-ray pulse from the constant in each time interval. The green line corresponds to χ² = 1, and the orange line to the 2σ deviation of the pulsed flux from the constant.