The laboratory data has been reported in
(1) P. Caselli and L. Dore, 2005, Astron. Astrophys., 433, 1145.
With respect to the Oct. 2005 entry, additional high-J data was used. It was taken from
(2) V. Lattanzi, A. Walters, B. J. Drouin, and J. C. Pearson, 2007, Astrophys. J., 662, 771.
In contrast to earlier work, (1) and (2) seem to have avoided frequency shifts due to ion drift.
Predictions beyond 2 THz should be viewed with caution.
At low J, it may be possible to resolve the D hyperfine splitting. It is quite similar to that of DCO⁺, see e30510.cat.
The dipole moment is assumed to agree with that of the main isotopic species, see e029507.cat.