Top panels: Reduction factor of the γ-ray emission at energy E_γ = 100 GeV (solid curve) and at 1 TeV (dashed curve), R = exp(−τ), as a function of time measured from the pericentre of the star on its orbit around the SMBH with the mass 4 × 10⁶ M_⊙. The orbit of the star is defined by the semi-major axis a = 2 × 10¹⁶ cm and the eccentricity e = 0.87 (as observed in the case of the star S2 on the orbit around Sgr A^⋆). In panels (a) and (b) the star has radius R_⋆ = 10¹² cm and surface temperature T_O = 3 × 10⁴ K. The light curves are shown for the pericentre (Figure a) and the apocentre (b) passages of this star. The light curves for the WR-type star (T_WR = 10⁵ K and R_WR = 3 × 10¹¹ cm) at the pericentre and apocentre are shown in Figures (c) and (d), respectively. The observer is located at the angle α_obs = 1° in (a) and (c)) and 0.1° in (b) and (d) with respect to the plane of the orbit and at the phase Φ_obs = 0° measured from the pericentre or the apocentre of the stellar orbit. Bottom panels: Reduction factors as a function of the γ-ray energy for the parameters in the corresponding top panel.