Lyα emission galaxies at a redshift of z ≈ 5.7 in the FORS deep field C. Tapken, I. Appenzeller, A. Gabasch, J. Heidt, U. Hopp, R. Bender, D. Mehlert, S. Noll, S. Seitz and W. Seifert A&A, 455 1 (2006) 145-152 Published online: 31 July 2006 DOI: 10.1051/0004-6361:20064872