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7 papers · 1 filter
The AT20G view of Swift/BAT selected AGN: high-frequency radio waves meet hard X-rays
D. Burlon, G. Ghirlanda, T. Murphy +3
We cross-matched the 6-year Swift/Burst Alert Telescope (BAT) survey of active galactic nuclei (AGN) with the AT20G radio survey of the southern sky, which is one of the largest hi…
The X-ray Spectrum Of The Black Hole Candidate Swift J1753.5-0127
Reham Mostafa, Mariano Mendez, Beike Hiemstra +4
We present a spectral analysis of the black hole candidate and X-ray transient source Swift J1753.5 0127 making use of simultaneous observations of XMM-Newton and Rossi X-ray Timin…
The merger fraction of active and inactive galaxies in the local Universe through an improved non-parametric classification
Stefano Cotini, Emanuele Ripamonti, Alessandro Caccianiga +5
We investigate the possible link between mergers and the enhanced activity of supermassive black holes (SMBHs) at the centre of galaxies, by comparing the merger fraction of a loca…
High redshift blazars
G. Ghisellini
Blazars are sources whose jet is pointing to us. Since their jets are relativistic, the flux is greatly amplified in the direction of motion, making blazars the most powerful persi…
Understanding the dynamical structure of pulsating stars: The Baade-Wesselink projection factor of the delta Scuti stars AI Vel and beta Cas
G. Guiglion, N. Nardetto, P. Mathias +6
Aims. The Baade-Wesselink method of distance determination is based on the oscillations of pulsating stars. The key parameter of this method is the projection factor used to conver…
X-ray scattering of periodic and graded multilayers: comparison of experiments to simulations from surface microroughness characterization
B. Salmaso, D. Spiga, R. Canestrari +1
To enhance the reflectivity of X-ray mirrors beyond the critical angle, multilayer coatings are required. Interface imperfections in the multilayer growth process are known to caus…