The experimental lines are from D. Prudenzano, J. Laas, L. Bizzocchi, V. Lattanzi, C. Endres, B. M. Giuliano, S. Spezzano, M. E. Palumbo and P. Caselli, 2018, A&A 612, A56, doi: 10.1051/0004-6361/201732397. The quantum numbers are J, Ka and Kc.