New observations of the extended hydrogen exosphere of the extrasolar planet HD 209458b D. Ehrenreich, A. Lecavelier des Etangs, G. Hébrard, J.-M. Désert, A. Vidal-Madjar, J. C. McConnell, C. D. Parkinson, G. E. Ballester and R. Ferlet A&A, 483 3 (2008) 933-937 Published online: 01 April 2008 DOI: 10.1051/0004-6361:200809460