Fig. 1
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He I 4471 Å and He II 4542 Å for magnetic He-sdOs: previously known stars (top) and new ones from SALT/RSS (bottom). Observations are black and best-fit models red. All spectra are at the rest wavelength, offset in steps of 0.3 in normalised flux. They were convolved to the RSS resolution (1.05 Å) except for that of J0415+2538, which has a worse resolution (1.9 Å).
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