CMDs of star-like objects in the studied field. The isochrone of 7 Gyr age and Z = 0.0001 metallicity (the blue line), the limit of the MW stars as in Fig. 4a (the grey dashed line), and photometric scatter limits as in Fig. 4a (cyan and red lines) are plotted in all panels. The objects within radial distances of a) r < 8′, b) 8′ < r < 10′, and c) r > 10′ from the galaxy centre are shown with circles in the corresponding panels. Filled colour circles mark the objects: in the vicinity of the isochrone lie probable Leo A members (blue); far from the isochrone and inside the CMD area occupied by MW stars (red); far from the isochrone lie probable compact faint blue galaxies, Leo A blue stragglers, or MW white dwarfs (cyan). Open grey circles mark faint star-like objects that were not used for the analysis.