UV slope of z ∼ 3 bright (L > L*) Lyman-break galaxies in the COSMOS field S. Pilo, M. Castellano, A. Fontana, A. Grazian, K. Boutsia, L. Pentericci, E. Giallongo, E. Merlin, D. Paris and P. Santini A&A, 626 (2019) A45 Published online: 10 June 2019 DOI: 10.1051/0004-6361/201834442