Astrophysical: Methods

  • Publication
    OSIRIS tunable imager and spectrograph: Instrument status
    OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) is the optical Day One instrument for the GTC and the only Spanish Day One...
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    Outer density profiles of 19 Galactic globular clusters from deep and wide-field imaging
    Using deep photometric data from Wide Field Camera at the Isaac Newton Telescope and Wide Field Imager at the ESO 2.2-m telescope we measure the outer number...
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    Outflows from starburst galaxies with various driving mechanisms and their X-ray properties
    Outflows in starburst galaxies driven by thermal-mechanical energy, cosmic rays, and their mix are investigated with 1D and 2D hydrodynamic simulations. We show...
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    PCA detection and denoising of Zeeman signatures in polarised stellar spectra
    Aims: Our main objective is to develop a denoising strategy to increase the signal to noise ratio of individual spectral lines of stellar spectropolarimetric...
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    Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data
    Aims: Large-Sized Telescope 1 (LST-1), the prototype for the Large-Sized Telescope at the upcoming Cherenkov Telescope Array Observatory, is concluding its...
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    Period, epoch, and prediction errors of ephemerides from continuous sets of timing measurements
    Space missions such as Kepler and CoRoT have led to large numbers of eclipse or transit measurements in nearly continuous time series. This paper shows how to...
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    Persistent magnetic vortex flow at a supergranular vertex
    Context. Photospheric vortex flows are thought to play a key role in the evolution of magnetic fields. Recent studies show that these swirling motions are...
  • Publication
    Phase diversity restoration of sunspot images. I. Relations between penumbral and photospheric features
    We investigate the dynamics of and the relations between small-scale penumbral and photospheric features near the outer penumbral boundary: penumbral grains...
  • Publication
    Phase diversity restoration of sunspot images. II. Dynamics around a decaying sunspot
    Two time series, taken simultaneously in the G-band and in white-light, and corrected for telescope aberrations and turbulence perturbations using the method of...