Astrophysical: Black hole physics

  • Publication
    Optical Emission of the Ultraluminous X-Ray Source NGC 5408 X-1: Donor Star or Irradiated Accretion Disk?
    We obtained three epochs of simultaneous Hubble Space Telescope (HST)/Wide Field Camera 3 and Chandra observations of the ultraluminous X-ray source (ULX) NGC...
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    Optical Properties of the Ultraluminous X-Ray Source Holmberg IX X-1 and Its Stellar Environment
    Holmberg IX X-1 is an archetypal ultraluminous X-ray source (ULX). Here we study the properties of the optical counterpart and of its stellar environment using...
  • Publication
    Optical studies of the X-ray transient XTE J2123-058 - I. Photometry
    We present optical photometry of the X-ray transient XTE J2123-058, obtained in 1998 July-October. The light curves are strongly modulated on the 5.95-h orbital...
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    Optical Study of the Hyper-luminous X-Ray Source 2XMM J011942.7+032421
    We present the identification and characterization of the optical counterpart to 2XMM J011942.7+032421, one of the most luminous and distant ultra-luminous X...
  • Publication
    Overview of an extensive multi-wavelength study of GX 339-4 during the 2010 outburst
    Context. The microquasar GX 339-4 experienced a new outburst in 2010: it was observed simultaneously at various wavelengths from radio up to soft γ-rays. We...
  • Publication
    Overview of an extensive multi-wavelength study of GX 339-4 during the 2010 outburst (Corrigendum)
    Not Available
  • Publication
    Parallel tracks in infrared versus X-ray emission in black hole X-ray transient outbursts: a hysteresis effect?
    We report the discovery of a new hysteresis effect in black hole X-ray binary state transitions, that of the near-infrared (NIR) flux (which most likely...
  • Publication
    Phase-dependent Study of Near-infrared Disk Emission Lines in LB-1
    The mass, origin, and evolutionary stage of the binary system LB-1 have been intensely debated, following the claim that it hosts an ∼70M ☉ black hole, in stark...
  • Publication
    Photoionization instability of the Fe K absorbing plasma in the neutron star transient AX J1745.6-2901
    AX J1745.6-2901 is a low-mass X-ray binary with an accreting neutron star, showing clear evidence for highly ionized absorption. Strong ionized Fe Kα and Kβ...