Limits on the luminosity function of Lyα emitters at z = 7.7 P. Hibon, J.-G. Cuby, J. Willis, B. Clément, C. Lidman, S. Arnouts, J.-P. Kneib, C. J. Willott, C. Marmo and H. McCracken A&A, 515 (2010) A97 Published online: 15 June 2010 DOI: 10.1051/0004-6361/200912109