Astrophysical: Galaxies

  • Publication
    X-ray spectral properties of active galactic nuclei in the Chandra Deep Field South
    We present a detailed X-ray spectral analysis of the sources in the 1Ms catalog of the Chandra Deep Field South (CDFS) taking advantage of optical spectroscopy...
  • Publication
    X-ray spectral properties of the AGN sample in the northern XMM-XXL field
    In this paper we describe and publicly release a catalogue consisting of 8445 point-like X-ray sources detected in the XMM-XXL north survey. For the 2512 AGN...
  • Publication
    X-ray spectral variability of LINERs selected from the Palomar sample
    Context. Variability is a general property of active galactic nuclei (AGN). The way in which these changes occur at X-rays is not yet clearly understood. In the...
  • Publication
    X-ray spectral variability of seven LINER nuclei with XMM-Newton and Chandra data
    Context. One of the most distinctive features in active galactic nuclei (AGN) is the variability of their emission. Variability has been discovered at X-ray, UV...
  • Publication
    X-Ray Variability in LINERs
    Active galactic nuclei (AGN) are powered by energetic phenomena which cannot be attributed to stars. LINERs appears to be the low power end of the AGN sequence...
  • Publication
    X-ray variability in LINERs
    One of the most important features in active galactic nuclei (AGN) is the variability of their emission. Variability has been discovered at X-ray, UV, and radio...
  • Publication
    X-ray variability of 104 active galactic nuclei
    We have performed a uniform analysis of the power spectrum densities (PSDs) of 104 nearby (z ~= 2 × 10-4 Hz. Only KUG 1031+398 (RE J1034+396) shows evidence for...
  • Publication
    X-ray variability of 104 active galactic nuclei. XMM-Newton power-spectrum density profiles
    Context. Active galactic nuclei (AGN), powered by accretion onto supermassive black holes (SMBHs), are thought to be scaled up versions of Galactic black hole X...
  • Publication
    X-ray-selected broad absorption line quasi-stellar objects
    We study a sample of six X-ray-selected broad absorption line (BAL) quasi-stellar objects (QSOs) from the XMM-Newton Wide Angle Survey. All six objects are...