Absorption of high-energy gamma rays in Cygnus X-3 B. Cerutti, G. Dubus, J. Malzac, A. Szostek, R. Belmont, A. A. Zdziarski and G. Henri A&A, 529 (2011) A120 Published online: 15 April 2011 DOI: 10.1051/0004-6361/201116581