2 papers
astro-ph2004
Quasars and Narrow-Line Seyfert 1s: Trends and Selection Effects
Joseph C. Shields, Anca Constantin
The SDSS has opened a new era for the study of AGN spectroscopic properties and how these depend on luminosity and time. In this presentation we review some of the current issues a…
astro-ph2003
Emission and absorption in Narrow-Line Seyfert 1 Galaxies
Anca Constantin, Joseph C. Shields
The emission and absorption attributes of the UV-blue nuclear spectra of the Narrow-Line Seyfert 1 (NLS1) galaxies are analyzed based on high quality archival HST observations. Mea…