Energy levels, transition frequencies and Einstein A coefficients were taken from JPL. The collisional rates are taken are the same as for SiO and include energy levels up to J=40 and collisional temperatures up to 2000 K. For details see Schöier et al. (2005).

• References
  Schöier, F.L, van der Tak, F.F.S., van Dishoeck, E.F., Black, J.H. 2005, A&A 432, 369