CMDs of 47 Tuc. Left: all objects detected in our 47 Tuc field (centered at 1.9 half-light radii) with S/N > 30. Middle: the same data as in the left panel but now PM-cleaned to eliminate all but the 47 Tuc stars. Only the MS stars within the indicated box are retained for analysis. The light lines in this panel delineate the color groups outlined in Section 3. Right: the straightened CMD indicating the four color groups used in the analysis. The black points at the color extremes were not used—they were more than two standard deviations away from the median color at a given magnitude.