Sulphur in the Sculptor dwarf spheroidal galaxy - Including NLTE corrections Á. Skúladóttir, S. M. Andrievsky, E. Tolstoy, V. Hill, S. Salvadori, S. A. Korotin and M. Pettini A&A, 580 (2015) A129 Published online: 19 August 2015 DOI: 10.1051/0004-6361/201525956