XMM-Newton unveils the complex iron Kα region of Mrk 279 E. Costantini, J. S. Kaastra, K. Korista, J. Ebrero, N. Arav, G. Kriss and K. C. Steenbrugge A&A, 512 (2010) A25 Published online: 24 March 2010 DOI: 10.1051/0004-6361/200912555