Fig. 3.
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Magellan/FIRE spectrum of QSO J1439+1117 (blue; smoothed with a 4-pixel Gaussian kernel) and spectral uncertainty (orange). Dashed red lines mark the main QSO emission lines at z = 2.585, while dashed green lines mark sub-DLA absorption lines at z = 2.41837. Spectral windows with poor atmospheric transmission are marked in gray.
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