The X-ray luminous galaxies optically classified as star forming are mostly narrow line Seyfert 1 sN. Castelló-Mor, X. Barcons, L. Ballo, F. J. Carrera, M. J. Ward and C. JinA&A, 544 (2012) A48DOI: https://doi.org/10.1051/0004-6361/201118301
