Four eFEDS X-ray source classes “secure Galactic” (red), “likely Galactic” (orange), “secure extragalactic” (blue), and “likely extragalactic” (cyan) defined in the flowchart presented in Fig. 8, distributed according to their distance from the two lines defined in Fig. 9. Three of the four wedges thus defined contain extragalactic or Galactic samples that are up to 99% pure (see text for details).