The lines were taken from
(1) S. Saito, 1970, J. Chem. Phys. 53, 2544,
(2) W. W. Clark and F. C. De Lucia, 1976, J. Mol. Spectrosc. 60, 332,
(3) Y. Endo, H. Kanamori, and E. Hirota, 1987, Chem. Phys. Lett. 141, 129.
(4) M. Bogey, S. Civis, B. Delcroix, C. Demuynck, A. F. Krupnov, J. Quiguer, M. Yu. Tretyakov, and A. Walters, 1997, J. Mol. Spectrosc. 182, 85,
(5) Th. Klaus, S. P. Belov, G. Winnewisser, 1997, J. Mol. Spectrosc. 186, 416.
The electric dipole moment is from (1). The a¹Δ, v=0 state is 5879.2 cm^-1 above the X³Σ, v=0 state; the v=1 - v=0 difference is 1101.4 cm^–1, e.g.
(6) M. Bielefeld, G. Elfers, E. H. Fink, H. Kruse, J. Wildt, R. Winter, and F. Zabel, 1984, J. Photochem. 25, 419.