Reduced χ² results for the RADEX T_kin-n_H2 grid search. The black contours are drawn at , , and , corresponding to 1σ, 2σ, and 3σ confidence levels, respectively. The column densities of A-CH₃OH were set to 1.8 × 10¹⁴ cm⁻² and 0.7 × 10¹⁴ cm⁻² for the G1 and G2 velocity components, respectively, and the A/E abundance ratio was set to unity. Kinetic temperatures were explored between 6 and 100 K, in steps of 1 K, and the H₂ densities were set in cm⁻³-logarithmic values between 3 and 6, in steps of 0.1.