A characterization of the NGC 4051 soft X-ray spectrum as observed by XMM-Newton A. A. Nucita, M. Guainazzi, A. L. Longinotti, M. Santos-Lleo, Y. Maruccia and S. Bianchi A&A, 515 (2010) A47 Published online: 08 June 2010 DOI: 10.1051/0004-6361/200913673