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Fig. 5

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FORS2 two-dimensional spectrum from 6800 to 9400 Å (top). The shaded green rectangles mark the noisy regions affected by intense sky emission lines. A zoom on the Lyα and N v positions in the wavelength interval 6800–7500 Å (blue dotted rectangle) is shown in the middle and bottom of the figure. The wavelength of the Lyα and N v at the systemic redshift derived from the [NII]205 μm line (Nagao et al. 2012) are also reported (green vertical dotted lines).

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