On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies F. Panessa, L. Bassani, M. Cappi, M. Dadina, X. Barcons, F. J. Carrera, L. C. Ho and K. Iwasawa A&A, 455 1 (2006) 173-185 Published online: 31 July 2006 DOI: 10.1051/0004-6361:20064894