Fig. A.15.
Portion of the X-shooter spectrum of J 1143+1420 covering the absorption lines of H2 at z = 2.3225. The normalised data are shown in black, and the synthetic profile is over-plotted in red. Horizontal blue segments connect rotational levels (short downward arrows) from a given Lyman (L) or Werner (W) band, as labelled above them. The data selected for fitting are highlighted as green points. The strong absorption at ∼3410 Å is due to H I Ly β.
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