Fig. 1
Ly-α profile in the two proximate absorbers toward Q0841+129. The red line shows the best-fit Voigt profile with log N(H i) = 20.80 ± 0.10 in the DLA at zabs = 2.47621 (centre of the figure) and log N(H i) = 19.00 ± 0.15 in the sub-DLA at zabs = 2.50620 (toward the right). 1σ errors are shown with blue dashed lines. The red dotted line shows the fit to the DLA only.
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