Astrophysical: Active galactic nuclei

  • Publication
    High-resolution imaging of active galactic nuclei
    A sample of active galaxies and quasars was observed with a photon-counting detector (IPCS) working in time-resolved imaging mode. The observing and data...
  • Publication
    Image sharpening observations of active galactic nuclei
    It is shown that recentering, selecting, and adding up sharp short-exposure images obtained with a photon-counting detector working in time-resolved mode can...
  • Publication
    Intermediate-resolution spectropolarimetry of 3C 273
    Spectropolarimetric observations of the quasar 3C 273 over the range 3200-8000 A show wavelength-dependent polarization in the continuum, while the lines had no...
  • Publication
    Intermediate-resolution spectropolarimetry of a small sample of quasars
    We present spectropolarimetric observations of a sample of three quasars selected because of their very different broad-band polarization properties. All of the...
  • News
    James Webb telescope studies organic molecules near black holes
    Research led by the University of Oxford and with the participation of the Instituto de Astrofísica de Canarias (IAC) has succeeded in studying, for the first...
  • News
    La Palma telescopes participate in the discovery of a young blazar produced by the merger of two galaxies
    An international team of scientists has obtained the first unequivocal detection of a very high speed jet of matter emitted by a galaxy in the process of...
  • News
    LST-1 telescope on La Palma detects the most distant quasar at very high energies
    The first Large-Sized Telescope (LST) prototype of the Cherenkov Telescope Array Observatory (CTAO), located at the Roque de los Muchachos Observatory (Garafía...
  • Publication
    Modeling an accretion disk in NGC 985
    An optically thick relativistic Keplerian accretion disk model is used to fit the broad component of the H-alpha, H-beta, and He I 5876 A emission line profiles...
  • Publication
    Monitoring of active galacitc nuclei. 4: The Seyfert 1 galaxy NGC 4593
    Results of a five-month campaign of optical monitoring the Seyfert 1 galaxy NGC 4593 are presented. High resolution H-alpha and H-Beta spectra and direct images...