Space telescopes reveal secrets of turbulent black hole

Based on the articles:

• Paper I: "Variability and spectral energy distribution", by J. S. Kaastra et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A36
• Paper II: "Analysis of high-quality Reflection Grating Spectrometer spectra ", by J. S. Kaastra et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A37
• Paper III: "The 600 ks RGS spectrum: unravelling the inner region of an AGN", by R. G. Detmers et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A38
• Paper IV: "Optical-UV-X-ray variability and the nature of the soft X-ray excess", by M. Mehdipour et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A39
• Paper V: "Chandra-LETGS observation of the ionized absorber", by J. Ebrero et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A40
• Paper VI: "HST/COS observations of the far-ultraviolet spectrum", by G. A. Kriss et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A41
• Paper VII: "Relative abundances of the warm absorber", by K. C. Steenbrugge et al.
  Published in Astronomy & Astrophysics, 2011, vol. 534, A42