Example of a star with a strong emission line. Top panel: c^* vs. G for the star Gaia DR3 3220599441863236608. The two quantities are moderately correlated (r_exf = 0.57). Middle panel: G_BP and G_RP epoch spectra corresponding to c^* = 0.026. Bottom panel: G_BP and G_RP epoch spectra corresponding to c^* = 0.2. In this case the high corrected excess factor is due to a strong emission line falling in a region where the sensitivity of the G and G_RP bands are different. We note that the G_BP and G_RP epoch spectra are only shown here for illustration; they will be available to the community in Gaia DR4.