A Lyman α emitter at z = 6.5 found with slitless spectroscopy J. D. Kurk, A. Cimatti, S. di Serego Alighieri, J. Vernet, E. Daddi, A. Ferrara and B. Ciardi A&A, 422 1 (2004) L13-L17 Published online: 06 July 2004 DOI: 10.1051/0004-6361:20040189