Notes. Values in parentheses are the uncertainty of the last significant figures. ^a Adopted rest frequencies. ^b Local standard of rest velocity of the emission for the adopted rest frequency (in km s⁻¹). ^c Line width at half-intensity derived by fitting a Gaussian profile to the observed lines (in km s⁻¹). ^d Integrated line intensity in K km s⁻¹; we assumed that the uncertainty is dominated by the calibration error of 10%. ^e The sensitivity of the data (root mean square error) has been derived from a baseline fit to each line in a velocity window from −15 to 25 km s⁻¹ (in mK). ^f Excitation temperature derived from the LVG modelling for each hyperfine transition. The density of the model is different for the lines at 7 mm (n(H₂) = 1×10⁴ cm⁻³) and those at 3 mm (n(H₂) = 2×10⁴ cm⁻³), see Sect. 3.1. ^g Weighted average of the involved hyperfine components. ^h Sum of the line strengths of the hyperfine components that contribute to the line.