Astrophysical: Accretion

  • Publication
    Optical spectroscopy and photometry of SAX J1808.4-3658 in outburst
    We present phase resolved optical spectroscopy and photometry of V4580 Sagittarii, the optical counterpart to the accretion powered millisecond pulsar SAX J1808...
  • Publication
    Optical spectroscopy of 4U 1812-12. An ultra-compact X-ray binary seen through an H II region
    The persistent low-luminosity neutron star X-ray binary 4U 1812-12 is a potential member of the scarce family of ultra-compact systems. We performed deep...
  • Publication
    Optical spectroscopy of flares from the black hole X-ray transient A0620-00 in quiescence
    We present a time-resolved spectrophotometric study of the optical variability in the quiescent soft X-ray transient A0620-00. Superimposed on the double-humped...
  • Publication
    Optical spectroscopy of the low-mass X-ray binary GX9+9
    Phase-resolved medium-resolution VLT spectroscopy of the low-mass X-ray binary GX9+9 has revealed narrow CIII emission lines that move in phase relative to our...
  • Publication
    Optical studies of the X-ray transient XTE J2123-058 - II. Phase-resolved spectroscopy
    We present time-resolved spectroscopy of the soft X-ray transient XTEJ2123-058 in outburst. A useful spectral coverage of 3700-6700Å was achieved spanning two...
  • Publication
    Optical Studies of V:404-CYGNI the X-Ray Transient GS:2023+338 - Part Three - the Secondary Star and Accretion Disc
    We present new results from the analysis of 55 high-resolution spectra of V404 Cyg (the optical counterpart of the X-ray transient GS 2023+338) taken in 1991...
  • Publication
    Optical, X-ray, and γ-ray observations of the candidate transitional millisecond pulsar 4FGL J0427.8-6704
    We present an optical, X-ray, and γ-ray study of 1SXPS J042749.2-670434, an eclipsing X-ray binary that has an associated γ-ray counterpart, 4FGL J0427.8-6704...
  • Publication
    Orbital and quasi-periodic optical variations in the black hole X-ray binary V404 CYG
    We present 2 weeks of CCD photometry of V404 Cyg, the optical counterpart of the soft X-ray transient (SXT) GS 2023+338, taken from La Palma in 1992 July. The R...
  • Publication
    Orbital parameters of the microquasar LS I +61 303
    New optical spectroscopy of the high-mass X-ray binary microquasar LS I +61 303 is presented. Eccentric orbital fits to our radial velocity measurements yield...