1. O. L. Polyansky, N. F. Zobov, S. Viti, J. Tennyson, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK.
2. P. F. Bernath, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1, and Department of Chemistry, University of Arizona, Tucson, AZ 85721, USA.
3. L. Wallace, National Optical Observatories, Post Office Box 26732, Tucson, AZ 85732, USA.