(a) Preliminary m_F606W versus m_F606W − m_F814W CMD of sources within the studied field. Only those having |RADXS|< 0.1 in both F606W and F814W filters are shown. The magenta line denotes the fiducial line for the WD CS, while the green lines bound the region in the CMD used for counting the WDs. (b) CMD for ASs, which is presented on the same scale. The magenta and green lines from panel (a) are retained. The green lines define an area generous enough to encompass both the majority of observed real WDs in panel (a) and the ASs introduced along the WD fiducial line, which were recovered despite exhibiting substantial photometric errors.