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Fig. 2.
Lyα and [OIII]5007 detections in the X-shooter spectrum that are offset by ≈1″ to the west. This confirms that a foreground source (ID 593625 in Laigle et al. 2016) is present at z = 2.142. Lyα emission is redshifted by +130 km s−1 compared to the systemic redshift based on [OIII]5007.
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