152 citations · 2.4k across the 122 of their papers we have counts for
7 papers · 1 filter
NuSTAR spectral analysis of two bright Seyfert 1 galaxies: MCG +8-11-11 and NGC 6814
A. Tortosa, S. Bianchi, A. Marinucci +10
We report on the NuSTAR observations of two bright Seyfert 1 galaxies, namely MCG +8-11-11 (100 ks) and NGC 6814 (150 ks). The main goal of these observations was to investigate th…
The MEXSAS2 Sample and the Ensemble X-ray Variability of Quasars
R. Serafinelli, F. Vagnetti, E. Chiaraluce +1
We present the second Multi-Epoch X-ray Serendipitous AGN Sample (MEXSAS2), extracted from the 6th release of the XMM Serendipitous Source Catalogue (XMMSSC-DR6), cross-matched wit…
Multi-wavelength campaign on NGC7469 II. Column densities and variability in the X-ray spectrum
U. Peretz, E. Behar, G. A. Kriss +16
We investigate the ionic column density variability of the ionized outflows associated with NGC7469, to estimate their location and power. This could allow a better understan…
The NuSTAR view of the true Type 2 Seyfert NGC3147
Stefano Bianchi, Andrea Marinucci, Giorgio Matt +6
We present the first NuSTAR observation of a 'true' Type 2 Seyfert galaxy. The 3-40 keV X-ray spectrum of NGC3147 is characterised by a simple power-law, with a standard Γ~1.7 and…
Ensemble quasar spectral variability from the XMM-Newton Serendipitous Source Catalogue
Roberto Serafinelli, Fausto Vagnetti, Riccardo Middei
Variations of the X-ray spectral slope have been found in many Active Galactic Nuclei (AGN) at moderate luminosities and redshifts, typically showing a "softer when brighter" behav…
A long term study of AGN X-ray variability. Structure function analysis on a ROSAT-XMM quasar sample
R. Middei, F. Vagnetti, S. Bianchi +3
Variability in the X-rays is a key ingredient in understanding and unveiling active galactic nuclei (AGN) properties. In this band flux variations occur on short time scales (hours…