Intensity distributions of the rare isotopologs of the traditional dense-gas tracers represented in Fig. 3. Left panels: original uncorrected data. Middle panels: data after applying the correction factors described in Appendix D.2 to simulate emission at a constant temperature of 10 K. Right panels: ratio between the temperature-corrected intensity and the H₂ column density (in units of 10²² cm⁻²) as a function of gas temperature. All data are color-coded as in previous figures.