Fig. 16.

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Radius-luminosity relation for the currently available 78 Mg II sources. The best-fit relation determined by the classical least-squares fitting is indicated by the solid green line. The updated Mg II emission-line time delay of days is depicted by a black circle, while the previous measurement is shown as a gray circle for comparison. The overall scatter is ∼0.29 dex. For 66 sources, we have available measurements of the relative Fe II strength (RFe II parameter), which are color-coded according to the axis on the right. The dotted and dashed green lines show 1 and 2σ prediction intervals, respectively, for the sample of 78 Mg II RM sources.
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