Fig. 4

Contours at 1, 2, and 3σ confidence levels for the best-fitting redshift of the ionized absorber of Model B, which translates into the radial velocity of the absorber through the relationship υr = (zabs−zsys) * c, where zabs and zsys are respectively the redshift of the absorber and the systemic redshift of PG1211+143, and c is the speed of light.
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