Detection significance (Equation (7)) versus apparent AB magnitude for injected point sources and our 13 candidate movers. All measurements were made on the group difference images. The candidate movers fall within the scatter of the injected ﹩{ \mathcal S }﹩–magnitude relationship, confirming that the synthetic sources reproduce expected ﹩{ \mathcal S }﹩ behavior of real detections and validating their use in the completeness analysis of Figure 8.