Fig. 1.
Upper panel: median intensity spectrum of the quiet Sun normalized to the quiet-Sun continuum. Lower panel: spectra along the slit for the third scanning position. The reference wavelength λ0 = 10829.0911 Å is the central wavelength of the blue component of the He I 10830 Å multiplet. Close to it, the two red components of the same multiplet are blended in the same profile.
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