Rotational transition frequencies from a laboratory study and from astronomical observations were reported by
(1) J. Cernicharo, N. Marcelino, M. Agúndez, Y. Endo, C. Cabezas, C. Bermúdez, B. Tercero, and P. de Vicente, 2020, Astron. Astrophys. 642, Art. No. L17.
J. Cernicharo is thanked for confirming a fairly obvious 100 kHz typo of the J" = 4 line and for pointing out a less obvious typo of the J" = 10 line, which is 19 kHz lower than reported.
With respect to the first entry of Oct. 2020, laboratory millimeter data were added to the line list. These were reported by
(2) O. Asvany, S. Thorwirth, P. C. Schmid, T. Salomon, and S. Schlemmer, 2023, Phys. Chem. Chem. Phys. 25, 19740.
Uncertainties from that study were increased by a factor of 1.5. Calculations beyond 400 GHz should be viewed with caution. The dipole moment was taken from a quantum chemical calculation by
(3) S. Thorwirth, M. E. Harding, O. Asvany, S. Brünken, P. Jusko, K. L. K. Lee, T. Salomon, M. C. McCarthy, and S. Schlemmer, 2020, Mol. Phys. 118, Art. No. e1776409.