The UCHVC AGC 501816 is located on the sky roughly 7′ from the outer Galactic halo globular cluster Pal 3. We ran the detection pipeline on the images of the AGC 501816 field with Pal 3 present and with Pal 3 removed; this set of plots shows some of the results from the searches carried out with the GC present in the images. The top-left plot shows the locations of the stars detected in the field (gray points), the stars selected by the CMD filter (red points), and the H I ellipse for the UCHVC from ALFALFA (green ellipse). The region of the detected overdensity is marked with a magenta circle of radius 3′. A yellow circle of the same size is placed at a random location in the outskirts of the field and used to generate a comparison CMD; the sources within the detection and reference circle are compared as part of the assessment process described in Section 4.3. The plot on the bottom left shows the smoothed surface density map of the CMD-selected stars, with the same magenta and yellow circles and the green ellipse as are shown in the top-left plot. The CMD in the top right shows all of the sources in the field (black points), the CMD filter (blue solid line), and the CMD-selected stars (red points). The CMDs for objects located within the detection circle and comparison (reference) circle appear on the bottom right. The detection pipeline found Pal 3 at 100% significance at a distance range of 86−106 kpc, which brackets the actual distance of the cluster. It was also found at a distance of ∼160 kpc because of a combination of factors, including the shape of the CMD filter; see Section 5.1.2 for a full discussion.