Measured X-ray radial projected luminosity profiles (0.5–2.0 keV rest-frame) for the ALL_M10.7 GAMA central galaxy sample (‘STACK’, magenta crosses and shaded area). Each panel shows the result when a different mask is applied to the set of events: “ALL” (left), “M1” (middle), and “M3” (right). We note the variation in the y-axis range in different panels. The green dashed line represents the background level, estimated as discussed in Sect. 3.4. The profile shape expected if all sources stacked were point-like is shown with a gray line labeled “max PS”. The bottom series of panels shows the background-subtracted profiles with a linear radial scale extending to 300 kpc.