Fig. A.2.
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Distributions of different properties in the 2SXPS and 4XMM-D10 test samples (second and third columns; labels then stand for the selected class) and their KDE on the 2SXPS training sample (first column). From top to bottom: galactic latitude, Gaia proper motion, X-ray luminosity from GLADE, X-ray to r-band flux ratio, hardness ratio HR1, between Swift soft (0.3–1 keV) and medium (1–2 keV) bands – resp. HR2, between XMM-Newton band 2 (0.5–1 keV) and band 3 (1–2 keV) – and the lower limit on the variability ratio. The y axis is in arbitrary units.
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