The eROSITA Final Equatorial Depth Survey (eFEDS) - SDSS spectroscopic observations of X-ray sources

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Fig. 7.

Distribution of the ratio of the X-ray flux (F_X, flux at 0.2–2.3 keV from eROSITA) to the optical flux (F_O, flux from the r-band magnitude from the Legacy Survey DR8). The classes are colour-coded as in Figs. 5 and 6. The vertical lines correspond to Eq. (1).

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