The X-ray absorber of PKS 2126-158 F. Fiore, M. Elvis, R. Maiolino, F. Nicastro, A. Siemiginowska, G. Stratta and V. D'Elia A&A, 409 1 (2003) 57-64 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20031018