Characterization of the hot Neptune GJ 436 b with Spitzer and ground-based observationsB.-O. Demory, M. Gillon, T. Barman, X. Bonfils, M. Mayor, T. Mazeh, D. Queloz, S. Udry, F. Bouchy, X. Delfosse, T. Forveille, F. Mallmann, F. Pepe and C. PerrierA&A, 475 3 (2007) 1125-1129DOI: https://doi.org/10.1051/0004-6361:20078354