The transition frequencies were taken from
(1) C. A Gottlieb, A. J. Apponi, M. C. McCarthy, P. Thaddeus, and H. Linnartz, 2000, J. Chem. Phys 113, 1910.
The dipole moment (theoretical value) was taken from
(2) P. Botschwina and Ä. Heyl, 1999, Mol. Phys. 97, 209.