How stellar activity affects the size estimates of extrasolar planets S. Czesla, K. F. Huber, U. Wolter, S. Schröter and J. H. M. M. Schmitt A&A, 505 3 (2009) 1277-1282 Published online: 18 August 2009 DOI: 10.1051/0004-6361/200912454