Left: RC region of the CMD for a broad region encompassing the NSD, just for illustrative purposes. Two black boxes highlight stars within ΔK₀ = ±0.1 mag above and below the RC peak. These two samples should be dominated by RC stars at distances within ±380 pc from the GC (see text for details). Top right: map of the median longitude PM for the stars < 0.1 brighter than the RC peak. Bottom right: same thing for stars < 0.1 mag fainter than the RC peak. White lines show the density contour of the Sormani et al. (2022) model.