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Fig. 4.

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Lyα1/Lyα2 ratio calculated with CLOUDY for the Cen X-3 setting (dashed curve) and the observed ratio (shaded area). Though minor for this setup, the M1 transition (2s) 2 S 1 / 2 $ ^{2}{S\!}_{1/2} $ → (1s) 2 S 1 / 2 $ ^{2}{S\!}_{1/2} $ intensity is added to Lyα2, which cannot be resolved with Resolve.

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