Notes. Top part contains the best-fitting column density and excitation temperature of CH₃OD obtained during simultaneous fitting of these two parameters for both υ_t = 0 and 1 states together and the associated D/H ratio. We note that the statistical correction on the D/H ratio for the case of deuteration in the hydroxy group is one (Appendix C of Drozdovskaya et al. 2022; see also Manigand et al. 2019). The fitting has also been executed for the two υ_t states separately, for which the corresponding derived column densities and D/H ratios are the middle and lower parts, respectively. The second column contains the values for the one-beam offset position in the SW direction from IRAS 16293-2422 B (0.5″ or 70 au away from the dust peak of B). For the calculations of D/H ratios, the adopted methanol column densities is (1.0 ± 0.2) × 10¹⁹ cm⁻² (Jørgensen et al. 2018). The stated errors on N and T_ex are assumed 20% and 10% errors, respectively. The errors derived with the MCMC routine in this work are much smaller (we refer to Drozdovskaya et al. (2022) for a discussion about that). For each of the three fitting scenarios, the number of lines with unique frequencies used for the fitting and the E_up range spanned by these lines are also provided.