Table 1.
Lines of interest.
| Line | Rest wavelength (Å) | Δv (km s−1) | Doppler shift (km s−1) |
|---|---|---|---|
| Fe II | 1392.816 | −203 | −0.5 |
| Ni II | 1393.33 | −93 | +0.6 |
| Si IV | 1393.76 | 0 | +5.9 |
Notes. The lines of Fe II and Ni II are used for wavelength calibration. The rest wavelengths are taken from Sandlin et al. (1986), see also Supplementary Material S1 of Peter et al. (2014). The third column shows the difference of the rest wavelengths to the Si IV rest wavelength in velocity units. The rightmost column lists the average absolute Doppler shifts in a plage area with respect to the respective rest wavelength. Positive values correspond to redshifts. See Sect. 2.
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