The millimeter and lower submillimeter data were taken from
(1) Z. T. P. Fried, R. A. Motiyenko, M. Sanz-Novo, L. Kolesniková, J.-C. Guillemin, L. Margulès, T. Uhlíková, A. Belloche, J. K. Jørgensen, M. S. Holdren, C. Xue, Š Urban, I. Jiménez-Serra, V. M. Rivilla, and B. A. McGuire, 2025, Astrophys. J. 992, Art. No. 187.
The calculation should be accurate enough for radio astronomical searches. Transitions with calculated uncertainties exceeding 0.1 MHz should be viewed with caution.
The dipole moment components were taken from a quantum chemical calculation in (1).