122 citations · 954 across the 47 of their papers we have counts for
14 papers · 1 filter
The rise and decline of a transient obscuration event in a moderately distant type-I quasar
A. Akylas, A. Georgakakis, E. Pouliasis +5
Outflows of ionised material, often dubbed warm absorbers (WAs), are common in nearby Seyferts but sparse in distant and more energetic quasars (QSOs). We present multi-epoch X-ray…
Harnessing the XMM-Newton data: X-ray spectral modelling of 4XMM-DR11 detections and 4XMM-DR11s sources
A. Viitanen, G. Mountrichas, H. Stiele +13
The XMM-Newton X-ray observatory has played a prominent role in astrophysics, conducting precise and thorough observations of the X-ray sky for the past two decades. The most recen…
Measuring monster MBHs: maybe mighty, maybe merely massive
M. Gliozzi, A. Akylas, J. K. Williams +1
Accurate black hole mass (MBH) measurements in high-z galaxies are difficult yet crucial to constrain the growth of supermassive BHs, and to discriminate between competing BH seed…
Ensemble X-ray variability of optically selected QSOs: dependence on black hole mass and Eddington ratio
A. Georgakakis, J. Buchner, A. Ruiz +7
Although flux variability is one of the defining properties of accretion flows onto supermassive black holes, its dependence on physical parameters such as the mass of the compact…
Comparing indirect methods for black hole masses in AGN: the good, the bad, and the ugly
M. Gliozzi, J. K. Williams, A. Akylas +4
The black hole mass MBH is crucial in constraining the growth of supermassive BHs within their host galaxies. Since direct measurements of MBH with dynamical methods are restricted…
The STATiX pipeline for the detection of X-ray transients in three dimensions
A. Ruiz, A. Georgakakis, I. Georgantopoulos +3
The recent serendipitous discovery of a new population of short duration X-ray transients, thought to be associated with collisions of compact objects or stellar explosions in dist…