50 citations · 355 across the 15 of their papers we have counts for
6 papers · 1 filter
Swift data hint at a binary Super Massive Black Hole candidate at sub-parsec separation
P. Severgnini, C. Cicone, R. Della Ceca +10
Dual/binary Supermassive Black Hole (SMBH) systems are the inevitable consequence of the current Lambda Cold Dark Matter cosmological paradigm. In this context, we discuss here the…
SDSSJ143244.91+301435.3 at VLBI: a compact radio galaxy in a narrow-line Seyfert 1
A. Caccianiga, D. Dallacasa, S. Anton +4
We present VLBI observations, carried out with the European Very Long Baseline Interferometry Network (EVN), of SDSSJ143244.91+301435.3, a radio-loud narrow-line Seyfert 1 (RLNLS1)…
The structure of the X-ray absorber in Mrk 915 revealed by Swift
P. Severgnini, L. Ballo, V. Braito +5
In this paper we present the results obtained with a monitoring programme (23 days long) performed with Swift-XRT on the local Seyfert galaxy Mrk 915. The light-curve analysis show…
Mining the XRT archive to probe the X-ray absorber structure in the AGN population
L. Ballo, P. Severgnini, A. Moretti +6
One of the key ingredients of the Unified Model of Active Galactic Nuclei (AGN) is the presence of a torus-like optically thick medium composed by dust and gas around the putative…
The Hot and Energetic Universe: Understanding the build-up of supermassive black holes and galaxies at the heyday of the Universe
A. Georgakakis, F. Carrera, G. Lanzuisi +19
Observations in the last decade have provided strong evidence that the growth of supermassive black holes at the centres of galaxies is among the most influential processes in gala…
Decoupling absorption and continuum variability in the Seyfert 2 NGC 4507
V. Braito, L. Ballo, J. N. Reeves +3
We present the results of the Suzaku observation of the Seyfert 2 galaxy NGC 4507. This source is one of the X-ray brightest Compton-thin Seyfert 2s and a candidate for a variable…