WFC3 images of HSC v3 source with MatchID = 45740877 (centered) corresponding to the measurements highlighted in red in Fig. A.1. Images 1–4 show obvious distortions of the object’s shape due to uncleaned cosmic ray hits, resulting in outlier photometric measurements (Fig. A.1). Image 0 is an example of a measurement unaffected by a cosmic ray hit. We note the additional uncleaned cosmic rays in images 0–2.