Top panel: combination of Hess diagram and CMDs for the detected objects in the three observed fields. The different colors indicate densities, ranging from blue (lower densities) to red (higher densities). The diagrams correspond to the color indexes F475W − F606W and F606W − F814W at left and right, respectively. Bottom panel: same CMDs that are shown in the top panel, but we separate the blue and red populations with blue and red, respectively. The orange rectangle encloses the bright blue stars; we use this selection to search the young stellar groups. In this figure we overlapped the PARSEC version 1.2S isochrone (Tang et al. 2014) corresponding to 10⁷ years and metallicity Z = 0.0152. This model was displaced, adopting a distance modulus of (V₀ − M_V) = 27.78 (García-Varela et al. 2008), a normal reddening law (R = A_V/E(B − V) = 3.1), and a value for E(B − V) = 0.015, corresponding to the foreground reddening toward NGC 247 (Schlafly & Finkbeiner 2011).