Fig. 9
Top panel: ratio of observed soft (0.3–2.0 keV) to hard (2.0–10 keV) X-ray flux plotted versus the observed UVW2 (2030 Å) flux. Bottom panel: intrinsic luminosity of the soft excess component between 0.3–2.0 keV plotted versus the observed UVW2 (2030 Å) flux, and fitted with the power-law function given in Eq. (2).
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