TCDs of simulated stochastic star clusters. Each panel shows aperture photometry results for different combinations of cluster mass (marked above the panels) and age (marked to the right of the panels). For the definitions of the G1 and G2 cluster groups, see the text. Black lines (solid – no interstellar extinction; dashed – A_V = 1, calculated using the Fitzpatrick 1999 extinction curve) – PARSEC-COLIBRI based non-stochastic SSP solar metallicity models (Marigo et al. 2017) from 10 Myr to 12.6 Gyr. Measurements are performed using the circular aperture of radius R_ap = 3.0 arcsec.