• Publications
  • Influence
Ubiquitous equatorial accretion disc winds in black hole soft states
High-resolution spectra of Galactic black holes (GBHs) reveal the presence of highly ionized absorbers. In one GBH, accreting close to the Eddington limit for more than a decade, a powerful accretionExpand
  • 185
  • 25
  • PDF
Broad iron L line and X-ray reverberation in 1H0707-495
A detailed analysis of a long XMM-Newton observation of the narrow-line type 1 Seyfert galaxy 1H0707-495 is presented, including spectral fitting, spectral variability and timing studies. The twoExpand
  • 172
  • 20
  • PDF
Discovery of a relation between black hole mass and soft X-ray time lags in active galactic nuclei
We carried out a systematic analysis of time lags between X-ray energy bands in a large sample (32 sources) of unabsorbed, radio quiet active galactic nuclei (AGN), observed by XMM-Newton. TheExpand
  • 146
  • 16
  • PDF
The XMM–Newton view of the central degrees of the Milky Way
The deepest XMM-Newton mosaic map of the central 1.5 deg of the Galaxy is presented, including a total of about 1.5 Ms of EPIC-pn cleaned exposures in the central 15" and about 200 ks outside. ThisExpand
  • 55
  • 13
  • PDF
XMM–Newton study of the complex and variable spectrum of NGC 4051
We study the X-ray spectral variability of the narrow line Seyfert 1 galaxy NGC 4051 as observed during two XMM-Newton observations. To gain insight on the general behaviour, we first applyExpand
  • 121
  • 13
  • PDF
FADING HARD X-RAY EMISSION FROM THE GALACTIC CENTER MOLECULAR CLOUD Sgr B2
TLDR
The center of our Galaxy harbors a four million solar mass black hole that is unusually quiet: its present X-ray luminosity is more than 10 orders of magnitude less than its Eddington luminosity. Expand
  • 99
  • 11
  • PDF
Multiwavelength campaign on Mrk 509 - XII. Broad band spectral analysis
The origin of the different spectral components present in the high-energy (UV to X-rays/gamma-rays) spectra of Seyfert galaxies is still being debated a lot. One of the major limitations, in thisExpand
  • 67
  • 11
  • PDF
The truncated and evolving inner accretion disc of the black hole GX 339−4
The nature of accretion onto stellar mass black holes in the low/hard state remains unresolved, with some evidence suggesting that the inner accretion disc is truncated and replaced by a hot flow.Expand
  • 65
  • 11
  • PDF
X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
Evidence for both red- and blue-shifted absorption lines due to ionized Fe in the X-ray spectrum of the Seyfert 1 galaxy Mrk 509 is reported. These features appear to be transient on time-scales asExpand
  • 60
  • 11
  • PDF
Echoes of multiple outbursts of Sagittarius A⋆ revealed by Chandra
Context. The relatively rapid spatial and temporal variability of the X-ray radiation from some molecular clouds near the Galactic center shows that this emission component is due to the reflectionExpand
  • 64
  • 10
  • PDF