Fig. 2.
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Example of one of the absorption line systems studied in this work observed with increasingly higher resolution instruments. Each row shows the H I Lyα absorption and the region of spectrum where the strongest O I metal line should appear. The first row shows the archival SDSS data analyzed by Parks et al. (2018). The middle row shows the data taken in 2019 with WHT/ISIS. The final row shows the data taken with the high resolution echelle spectrograph Keck/HIRES.
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