Fig. 2
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Two examples of the nebular correction that has been applied to stars in the Carina Nebula. The black line shows the original spectrum, the red line the corrected spectrum. The effect is largest for Hα and the [N II] lines (HR14A setup) and becomes smaller for Hγ (HR04) and Hδ (HR03). The effect on He I λ4471.5 (HR05A) is very small.
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