Notes. The last column gives the category to which the property belongs: 0 = location, 1 = X-ray hardness and luminosity, 2 = multiwavelength profile, 3 = X-ray variability. ⁽¹⁾Evans et al. (2014) simulated a grid of power-law and APEC spectra and computed their corresponding HR values, so they can infer Γ and kT values from HR measurements. See Evans et al. (2014) for more details. ⁽²⁾Column added during catalog enrichment. ⁽³⁾Given by the best optical association as explained in the text. The blue band was used likewise to compute a column log₁₀(F_X/F_b). ⁽⁴⁾Given by the best infrared counterpart. The W2-band was used likewise to compute 1 extra column. ⁽⁵⁾The soft, medium and hard bands were used to compute this column. ⁽⁶⁾A positional crossmatch between 2SXPS, 4XMM-DR10 and CSC2 was done to identify sources in common and gather their observations in a single light curve. ⁽⁷⁾PvarPchiSnapshot_band3 is the probability that the source flux is constant between Swift snapshots in the hard band. See Evans et al. (2014) for more details. ⁽⁸⁾Given by the GLADE (Dalya et al. 2016) association. ⁽⁹⁾Given by the catalog of Gaia distances (Bailer-Jones et al. 2021).