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Fig. 1


Sample of two umbral profiles. The solid (dashed) line corresponds to a sunspot at μ = 0.58 (0.76). The continuum intensity of the quiet Sun profiles corresponding to each of them is unity. The short vertical lines mark four OH spectral lines, while the long vertical line denotes the Fe i 1564.8 nm line. Top: Stokes-I, bottom: Stokes-V.

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