Bright portion of CMDs of the five fields that show the highest excess of stars above the TRGB with stars brighter than the TRGB (dashed horizontal line at I₀ = 23.86) plotted as crosses (left). These CMDs have been statistically cleaned from foreground contamination using observations in F10A shown in the lower right CMD. Padova stellar evolutionary isochrones for different metallicities listed at the top, and ages 2, 4, 6 and 10 Gyr (right). The isochrones have been shifted to the distance of NGC 5128 and are color-coded according to stellar evolutionary stage: RGB (red circles), early AGB (blue circles), and TP-AGB (green circles). The boxes indicate regions for which the mass-specific production factor P_j has been computed from the isochrones (see text).