3 papers
astro-ph2004
The environment of Seyferts, Liners and HII galaxies in a Complete AGN sample
V. Zitelli, B. Kelm, P. Focardi +1
We use a complete AGN sample (Ho et al. 1997) to study the environment of Seyferts, LINERs and HII galaxies. For each AGN we search for companions in the UZC redshift catalogue and…
astro-ph2004
A Project for a New Echo-Mapping Campaign at Intermediate Redshift
Dario Trevese, Giovanna Stirpe, Fausto Vagnetti +2
AGN masses can be estimated by "single epoch" spectral measurements through a mass-luminosity- linewidth relation calibrated by echo mapping measurements of a reference sample of l…
astro-ph2002
Seyfert Galaxies in Compact Groups
P. Focardi, B. Kelm, V. Zitelli +1
We present results concerning the occurrence of Seyfert galaxies in a new large sample of Compact Groups (Focardi & Kelm 2002). Seyfert galaxies turn out to be relatively rare (<3%…