Astrophysical: Accretion

  • Publication
    The microvariability characteristics of OJ 287.
    We present the results of the study of visible (UBVRIZ) intra-night microvariability in the blazar OJ 287. Useful observations (at least four integrations in a...
  • Publication
    The Mid-infrared-emitting Jet in the Black Hole V404 Cygni in Quiescence
    Observations of some quiescent black hole X-ray binaries have revealed an excess of mid-infrared (MIR) emission above that expected from their donor stars. In...
  • Publication
    The multiwavelength polarization of Cygnus X-1
    Polarization measurements of the microquasar Cygnus X-1 exist at γ-ray, X-ray, ultraviolet, optical and radio frequencies. The γ-ray emission has been shown to...
  • Publication
    The Nature and Size of the Optical Continuum Source in QSO 2237+0305
    From the peak of a gravitational microlensing high-magnification event in the A component of QSO 2237+0305, which was accurately monitored by the Gravitational...
  • Publication
    The Nature of the UV/Optical Emission of the Ultraluminous X-Ray Source in Holmberg II
    We report on UV and X-ray spectroscopy and broadband optical observations of the ultraluminous X-ray source in Holmberg II. Fitting various stellar spectral...
  • Publication
    The nature of the X-ray binary transient MAXI J1834–021: Clues from its first observed outburst
    MAXI J1834–021 is a new X-ray transient discovered in February 2023. We analysed the spectral and timing properties of MAXI J1834–021 using NICER, NuSTAR and...
  • Publication
    The nature of the X-ray transient MAXI J0556-332
    Phase-resolved spectroscopy of the newly discovered X-ray transient MAXI J0556-332 has revealed the presence of narrow emission lines in the Bowen region that...
  • Publication
    The nature of the X-ray transient SAX J1711.6-3808
    SAX J1711.6-3808 is an X-ray transient in the Galactic bulge that was active from January through May of 2001 and whose maximum 1-200 keV luminosity was...
  • Publication
    The omnipresent flux-dependent optical dips of the black hole transient Swift J1357.2−0933
    Swift J1357.2-0933 is a black hole transient that is of particular interest due to the optical recurrent dips found during its first two outbursts (in 2011 and...