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Fig. 4
1, 2 and 3σ contours for a joint fit of the neutral hydrogen column density in the host galaxy, log NH i, and the neutral fraction of the intergalactic medium, xH i. The fit has been performed for three different normalising power-law SEDs: β = 0.96, β = 1.02 (best fit), and β = 1.08. The dot indicates the peak likelihood.
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