Panel a): Completeness contours in the m_F814W versus radial distance plane. The continuous line marks the completeness level of 0.50, while dotted lines indicate differences in completeness in steps of 0.10 units. The observed CMD and the CMD for AS (as added in red, as recovered in black) are plotted in panels b) and c), respectively. Panel d) shows the completeness for rMS stars as a function of m_F814W in the five annuli into which we divided the field of view. The footprints of our data are shown in panel e). [See text for details.]