Top: spectral region around He i D3 line. Neighboring photospheric lines used for the behavior check are marked with different colors. Bottom: evolution of the equivalent width of the selected photospheric lines (marked with the same colors) and of a continuum in the vicinity of the He i D3 line (black line). The curves were scaled for better comparison. The center of the x axis (time = 0 days) corresponds to the middle of the transit T₀ [HJD,UTC] = 2 456 109.26164.