The lines were reported by
(1) V. D. Gordon, M. C. McCarthy, A. J. Apponi, and P. Thaddeus, 2000, Astrophys. J. 540, 286.
¹H and ¹⁴N hyperfine splitting may be resolved at low values of N. Therefore, predictions with ¹H and ¹⁴N hyperfine splitting are available for N" < 10. NOTE: The partion function DOES take into account the hyperfine splitting !
The dipole moment is from an ab initio calculation by
(2) S. Ikuta, T. Tsuboi, and K. Aoki, 2000, J. Mol. Struct. (Theochem) 528, 297.