Demographics of stars with usable-quality observations from each observatory, compared to the full TSS25 Tier 1 target list. All panels show stellar effective temperature (T_eff) on the y-axis. Left panel: T_eff vs. distance. Middle panel: T_eff vs. V-band magnitude. Right panel: histogram of the number of stars per T_eff bin. Different observatories are indicated by distinct colors and symbols, and stack vertically if a star has usable-quality data from multiple observatories. Histogram bars start at zero and show the total number of stars in each T_eff bin. Versions of this figure with each observatory shown individually are provided in the Appendix.