257 citations · 2.9k across the 77 of their papers we have counts for
4 papers · 1 filter
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 X-ray outburst of the Galactic Centre magnetar SGR J1745-2900 during the first 1.5 year
F. Coti Zelati, N. Rea, A. Papitto +17
In 2013 April a new magnetar, SGR 1745-2900, was discovered as it entered an outburst, at only 2.4 arcsec angular distance from the supermassive black hole at the Centre of the Mil…
Missing cosmic metals revealed by X-ray absorption towards distant sources
S. Campana, R. Salvaterra, A. Ferrara +1
The census of heavy elements (metals) produced by all stars through cosmic times up to present-day is limited to ~50%; of these only half are still found within their parent galaxy…