Spearman’s correlation coefficient (solid line) and coefficient of determination (dashed line) of field stars from the combined (Isaacson & Fischer 2010; Ballering et al. 2013; Sierchio et al. 2014; Lorenzo-Oliveira et al. 2018) catalog after percentage cuts were performed on individual catalogs. Varied colors represent (B − V) bins. Field stars were considered outliers and were cut if they fell within the furthest 5%, 10%, 20%, and 30% residuals about the Q vs. τ fits made for each individual catalog.