An isotopic independent fit was published in
(1) J. L. Doménech, O. Asvany, C. R. Markus, S. Schlemmer, and S. Thorwirth, 2020, J. Mol. Spectrosc. 374, Art. No. 111375.
Some higher order parameters were evaluated in comparison to the neutral CN molecule by
(2) H. S. P. Müller, 2023, unpublished.
Rotational transition frequencies were reported by
(3) S. Thorwirth, P. Schreier, T. Salomon, S. Schlemmer, and O. Asvany, 2019, Astrophys. J. Lett. 882, Art. No. L6.
Rovibrational transition frequencies were taken from (1).
Various Combination differences were derived in (1) from
(4) A. Douglas and P. M. Routly, 1954, Astrophys. J. 119, 303.
Transition frequencies with calculated uncertainties exceeding 30 MHz or 0.001 cm^–1 should be viewed with caution.
The partition function takes into account the ¹⁴N spin multiplicity to be consistent with the pure rotational entry 026508.
The transition dipole moment was taken from a quantum chemical calculation in
(5) K. A. Peterson, 1995, J. Chem. Phys. 102, 262.