Astrophysical: X-ray binary stars

  • Publication
    A Multiwavelength Study of GRS 1716-249 in Outburst: Constraints on Its System Parameters

    We present a detailed study of the evolution of the Galactic black hole transient GRS 1716-249 during its 2016-2017 outburst at optical (Las Cumbres Observatory...

  • Publication
    Chemical composition of secondary stars in LMXBs: implications on the progenitors of black holes and neutron stars

    Recent studies of chemical abundances of secondary stars in low mass X-ray binaries have opened a new window to obtain information on the progenitors of black...

  • Publication
    Discovery of an X-Ray Photoionized Optical Nebula and a Radio Nebula Associated with the ULX NGC 4861 X-1

    We have conducted long-slit spectroscopic observations and analyzed archival radio data for the ultraluminous X-ray source (ULX) NGC 4861 X-1. Our spectral line...

  • Publication
    Dynamical Confirmation of a Black Hole in MAXI J1820+070

    We present time-resolved 10.4 m Gran Telescopio Canarias and 4.2 m William Herschel Telescope intermediate resolution spectroscopy of the X-ray transient MAXI...

  • Publication
    Echo Tomography of Sco X-1 using Bowen Fluorescence Lines

    We present preliminary results of a simultaneous X-ray/optical campaign of the proto-typical LMXB Sco X-1 at 1-10 Hz time resolution. Lightcurves of the high...

  • Publication
    Hunting for eclipsing Post Common Envelope Binaries from SDSS

    We give an overview of a project aiming to identify new eclipsing post common envelope binaries from the Sloan Digital Sky Survey. This work focuses on the...

  • Publication
    Indirect evidence for an active radio pulsar in SAX J1808.4-3658 during quiescence

    Millisecond radio pulsars are neutron stars that have been spun-up by the transfer of angular momentum during the low-mass X-ray binary phase. The transition...

  • News
    New source of lithium production found in the Universe

    A team of researchers from the Instituto de Astrofísica de Canarias (IAC), the University of Manchester and the Norwegian University of Science and Technology...

  • Publication
    Optical counterpart of the XTE J0929-314 in quiescence: constraints on the magnetic field

    We present VLT observations of the optical counterpart of th X-ray millisecond pulsar XTE J0929-314 in quiescence. We detected a very faint candidate in...