Fig. 3
Evolution of the Hα line profile of RR Lyr for the night 2014-09-14 (Blazhko phase ψ = 0.86). The third emission is the weak hump indicated by the arrows, and it occurs for ϕ = 0.332−0.407. The weak absorption features are telluric lines. The vertical line indicates the Hα line laboratory wavelength in the stellar rest frame.
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