Astrophysical: Accretion

  • Publication
    A detection of the donor star of Aquila X-1 during its 2004 outburst?
    Phase-resolved high-resolution optical spectroscopy has revealed narrow NIII and HeII emission lines from the soft X-ray transient Aquila X-1 during its 2004...
  • Publication
    A dynamical study of the circumstellar gas in UX Orionis
    We present the results of a high spectral resolution (lambda / Delta lambda = 49 000) study of the circumstellar (CS) gas around the intermediate mass, pre-main...
  • Publication
    A feasibility study on the photometric detection of quiescent black hole X-ray binaries
    We investigate the feasibility of detecting quiescent black hole X-ray binaries using optical photometric techniques. To test this, we employ a combination of r...
  • Publication
    A flickering study of nova-like systems KR Aur and UU Aqr
    We present a study of the flickering activity in two nova-like systems, KR Aur and UU Aqr. We applied a statistical model of flickering simulations in accretion...
  • Publication
    A four-hours long burst from Serpens X-1
    During a serendipitous observation of the BeppoSAX Wide Field Cameras, a very long type I X-ray burst was observed from the low mass X-ray binary Serpens X-1...
  • Publication
    A FWHM–K2 Correlation in Black Hole Transients
    We compare {{{H}}}α emission profiles of 12 dynamically confirmed black holes (BHs) and 2 neutron star X-ray transients (SXTs) in quiescence with those of a...
  • Publication
    A half-a-day long thermonuclear X-ray burst from KS 1731-260
    We report on an approximately twelve hour long X-ray flare from the low-mass X-ray binary KS 1731-260. The flare has a rise time of less than 13 min and...
  • Publication
    A late jet rebrightening revealed from multiwavelength monitoring of the black hole candidate XTE J1752-223
    We present optical monitoring of the black hole candidate XTE J1752-223 during its 2009-10 outburst and decay to quiescence. The optical light curve can be...
  • Publication
    A long-term modulation in XTEJ1716-389: an SS433-like system
    We report on the properties of a 99.3-d periodic modulation in the X-ray transient XTEJ1716-389. We associate this source with the transient KSJ1716-389, first...