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Fig. 5

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Hen 2-108: normalized Stokes I spectra of the central star of the round planetary nebula in the spectral regions around the He ii line at λ 5411.5 Å (left) and the C iv doublet at λ 5801.3 and 5812.0 Å (right) obtained on three different nights. The spectra are shifted in vertical direction by 0.1 units for clarity, with the epoch increasing from bottom to top.

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