Surface characterization of Pluto and Charon by L and M band spectra S. Protopapa, H. Boehnhardt, T. M. Herbst, D. P. Cruikshank, W. M. Grundy, F. Merlin and C. B. Olkin A&A, 490 1 (2008) 365-375 Published online: 25 August 2008 DOI: 10.1051/0004-6361:200809994