Astrophysical: Black holes

  • Publication
    XRISM reveals a variable, multi-phase outflow-inflow structure during the 2024 X-ray obscured outburst of black hole transient V4641 Sgr
    We report the results of a simultaneous X-ray and optical spectroscopy campaign on the Galactic black hole X-ray binary (BH XRB) V4641 Sgr, carried out with...
  • Publication
    XTE J1118+480 near Quiescence
    Following our optical monitoring of the halo black-hole candidate XTE J1118+480 (ATELs #383, #402, #424), we have obtained time-resolved R-band photometry with...
  • Publication
    XTE J1752-223 has faded to quiescence: optical and infrared magnitudes
    We have been regularly monitoring the outburst decay of the black hole candidate X-ray binary XTE J1752-223 (discovered by RXTE; ATel #2258) with the 2-m...
  • Publication
    XTE J1752-223: back to optical quiescence
    We observed the black hole candidate XTE J1752-223 (ATel #2258) with the William Herschel Telescope (WHT) and the ACAM imager/spectrograph at the Observatorio...