Empirical estimate of Lyα escape fraction in a statistical sample of Lyα emitters H. Atek, D. Kunth, D. Schaerer, M. Hayes, J. M. Deharveng, G. Östlin and J. M. Mas-Hesse A&A, 506 2 (2009) L1-L4 Published online: 15 September 2009 DOI: 10.1051/0004-6361/200912787