Precision on the recovered galaxy fluxes obtained from the FVG (upper panels) and PFVG (lower panels) distributions for the CS and HS of AGN activity. The red line shows the Sa-type host-galaxy (observer’s frame) spectrum. The galaxy fluxes (in mJy) at each filter are plotted as filled black stars. The lines indicate the range of galaxy values that is recovered within the 68% confidence interval, and they are given for an S/N = 10 (purple), 100 (cyan), and 200 (yellow).