Left and middle: Example of AGN decomposition, performed with the new package GingaFit, featuring the NGC 1279 X-ray source galaxy. Fitting residuals from single Sérsic, double Sérsic (bulge+disc), PSF+Sérsic, and PSF+double Sérsic models are labelled from A to D. The residuals, shown in linear scale, are normalised to the original image and zoomed-in to show the central area of the galaxy, enclosed in half the Kron Radius. Right: I_E AGN luminosity versus total AB magnitude of the host. The sub-populations of objects identified with properties that are similar to the X-ray sources are identified within the boundaries motivated by the faintest of the X-ray sources.