GNS and VIRAC2 H-band luminosity functions for the NSD field (blue box in Fig. 1). The black and gray histograms show the luminosity functions from GNS and VIRAC2, respectively, for all stars with measured PMs. The blue and orange histograms show the luminosity functions after applying a PM uncertainty cut, excluding stars with errors larger than 0.6 mas yr⁻¹. The red shaded region marks the approximate location of the red clump stars.