2.3k citations · 13.7k across the 239 of their papers we have counts for
6 papers · 1 filter
A new cosmological distance measure using AGN X-ray variability
Fabio La Franca, Stefano Bianchi, Gabriele Ponti +2
We report the discovery of a luminosity distance estimator using Active Galactic Nuclei (AGN). We combine the correlation between the X-ray variability amplitude and the Black Hole…
The NGC 3341 minor merger: a panchromatic view of the active galactic nucleus in a dwarf companion
Stefano Bianchi, Enrico Piconcelli, Miguel Ángel Pérez-Torres +4
We present X-ray (Chandra), radio (EVLA and EVN), and archival optical data of the triple-merging system in NGC3341. Our panchromatic analysis confirms the presence of a Seyfert 2…
The Link Between the Hidden Broad Line Region and the Accretion Rate in Seyfert 2 Galaxies
Andrea Marinucci, Stefano Bianchi, Fabrizio Nicastro +2
In the past few years more and more pieces of evidence have been presented for a revision of the widely accepted Unified Model of Active Galactic Nuclei. A model based solely on or…
Extreme Warm Absorber variability in the Seyfert Galaxy Mrk 704
Giorgio Matt, Stefano Bianchi, Matteo Guainazzi +8
In about half of Seyfert galaxies, the X-ray emission is absorbed by an optically thin, ionized medium, the so-called "Warm Absorber", whose origin and location is still a matter o…
Chandra monitoring of UGC 4203: the structure of the X-ray absorber
G. Risaliti, M. Elvis, S. Bianchi +1
We present a Chandra monitoring campaign of the highly variable Seyfert galaxy UGC 4203 (the "Phoenix Galaxy") which revealed variations in the X-ray absorbing column density on ti…
Variable partial covering and a relativistic iron line in NGC 1365
G. Risaliti, G. Miniutti, G. Fabbiano +8
We present a complete analysis of the hard X-ray (2-10 keV) properties of the Seyfert galaxy NGC 1365, based on a 60 ks XMM-Newton observation performed in January 2004. The two ma…