2001ApJ...558..578O

We have discovered a very radio loud narrow-line Seyfert 1 candidate: PKS 2004-447. This Seyfert is consistent with the formal definition for NLS1s, although it does not have quite the same spectral features as some typical members of this subclass. Only ROSAT survey data is available at X-ray wavelengths, so it has not been possible to compare this source with other NLS1's at these wavelengths. A full comparison of this source with other members of the subclass will improve our physical understanding of NLS1's. In addition, using standard calculations, we estimate the central black hole to have a mass of ∼5x10⁶ M_☉. This does not agree with predictions in the literature, that radio-loud active galactic nuclei host very massive black holes.