An optical view of the filament region of Abell 85 G. Boué, F. Durret, C. Adami, G. A. Mamon, O. Ilbert and V. Cayatte A&A, 489 1 (2008) 11-22 Published online: 01 July 2008 DOI: 10.1051/0004-6361:20078972