306 citations · 806 across the 35 of their papers we have counts for
4 papers · 1 filter
A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255: I. C IV absorption variability
D. Trevese, F. G. Saturni, F. Vagnetti +3
Broad Absorption Lines indicate gas outflows with velocities from thousands km/s to about 0.2 the speed of light, which may be present in all quasars and may play a major role in t…
A simplified view of blazars: clearing the fog around long-standing selection effects
P. Giommi, P. Padovani, G. Polenta +3
We propose a scenario where blazars are classified as flat-spectrum radio quasars (FSRQs), BL Lacs, low synchrotron, or high synchrotron peaked objects according to a varying mix o…
Ensemble X-ray variability of Active Galactic Nuclei from serendipitous source catalogues
F. Vagnetti, S. Turriziani, D. Trevese
The X-ray variability of the Active Galactic Nuclei (AGN) has been most often investigated with studies of individual, nearby, sources, and only a few ensemble analyses have been a…
Variability and the X-ray/UV ratio of Active Galactic Nuclei
F. Vagnetti, S. Turriziani, D. Trevese +1
The observed relation between the X-ray radiation from AGNs, originating in the corona, and the optical/UV radiation from the disk is usually described by the anticorrelation betwe…