Background-subtracted, exposure-corrected radial intensity distributions of the unresolved 2–6 keV emission, shown by crosses. The estimated contribution to the unresolved emission from PSF scattering of detected sources (dotted curve) and CV+AB (dashed curve) are marked. The two solid curves represent the sum of PSF+CV+AB+LMXB (unresolved), the latter estimated by assuming an LMXB LF, the faint-end power-law index of which is either 1.0 or 1.6. See the text for details.