Ratio between the e-H2 excitation rates summed over the initial and final rotational states and the CR ionisation rate for model ℋ and N = 10²⁰ cm⁻² as a function of the upper vibrational level, vu. Each subplot shows results for a different lower vibrational level, v_l. Solid green, violet, magenta, blue, and orange circles refer to the excitation of the B, C, B′, D, and a states from the ground state X, respectively. Empty black circles show a subset of previous estimates by Cecchi-Pestellini & Aiello (1992, see Sect. 3.5 for more details.)