Fig. 7.
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Power indexes of the UFO velocity Γvelocity as a function of X-ray luminosity versus Eddington ratio λEdd. The data come from the results listed in Tables 1 and 3. The horizontal dashed line denotes Γvelocity = 0. The blue line shows the linear regression fitted to the data in the linear-log scale with 1σ uncertainty shaded. PG 1211+143 is excluded from this plot due to multi-phase UFOs.
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