10 papers
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…
The ESO Slice Project (ESP) Galaxy Redshift Survey. VII. The Redshift and Real-Space Correlation Functions
L. Guzzo, J. G. Bartlett, A. Cappi +17
We present analyses of the two-point correlation properties of the ESP galaxy redshift survey. From the redshift-space correlation function xi(s), we see positive clustering out to…
The ESO Slice Project (ESP) galaxy redshift survey: VI Groups of Galaxies
M. Ramella, G. Zamorani, E. Zucca +17
In this paper we identify objectively and analyze groups of galaxies in the recently completed ESP survey. We find 231 groups above the number overdensity threshold delta(rho)/rho=…
ASCA detection of the FeK edge in the spectrum of the Seyfert 2 galaxy IRAS 04575-7537: a sign of a complex absorber
C. Vignali, A. Comastri, G. M. Stirpe +5
ASCA X-ray spectral analysis of the Seyfert 2 galaxy IRAS 04575-7537 is presented. The main result is the presence of a significant iron edge at a rest energy of 7.13^+0.21_-0.16 k…
BeppoSAX observations of Narrow-Line Seyfert 1 galaxies:I. Ton S 180
A. Comastri, F. Fiore, M. Guainazzi +10
We report on the first spectrum up to 10 keV of the bright narrow-line Seyfert 1 galaxy Ton S 180, obtained with the imaging instruments onboard BeppoSAX. This is the first observe…
A search for variability in Narrow Line Seyfert 1 Galaxies. II. New data from the Loiano monitoring programme
M. Ester Giannuzzo, Marco Mignoli, Giovanna M. Stirpe +1
We present part of the results from a spectroscopic monitoring programme on a sample of AGNs, relative to Narrow Line Seyfert 1 Galaxies: following the idea that Balmer-line variab…