Astrofísicas: Técnicas

  • Publicación
    Optical Spectroscopic Survey of a Sample of Unidentified Fermi Objects: II
    We report on optical spectroscopy obtained at the 10.4 m Gran Telescopio Canarias of 28 Fermi γ-ray sources that completes the study of a sample of 60 targets...
  • Publicación
    Optical spectroscopy of blazars for the Cherenkov Telescope Array - II
    Active galactic nuclei (AGNs) make up about 35 per cent of the more than 250 sources detected in very high-energy (VHE) gamma rays to date with the imaging...
  • Publicación
    Optical Tomography of a Sunspot. II. Vector Magnetic Field and Temperature Stratification
    An observational determination of the three-dimensional magnetic and thermal structure of a sunspot is presented. It has been obtained through the application...
  • Publicación
    Optical Tomography of a Sunspot. III. Velocity Stratification and the Evershed Effect
    The stratification with optical depth of the line-of-sight (LOS) velocity of a simple, isolated, round sunspot observed with the Advanced Stokes Polarimeter...
  • Publicación
    Optical-near infrared photometry of the Galactic globular cluster NGC 6441 .
    We present optical- near infrared photometry of the peculiar Galactic globular cluster NGC 6441. By using the K-band Period-Luminosity-Metallicity (PLZK) of its...
  • Publicación
    Optimising and comparing source-extraction tools using objective segmentation quality criteria
    Context. With the growth of the scale, depth, and resolution of astronomical imaging surveys, there is increased need for highly accurate automated detection...
  • Publicación
    Orbit determination of close binary systems using lucky imaging
    We present relative positions of visual binaries observed in 2009 with the FastCam 'lucky-imaging' camera mounted on the 1.5-m Carlos Sánchez Telescope at the...
  • Publicación
    Orbital elements, masses and distance of λ Scorpii A and B determined with the Sydney University Stellar Interferometer and high-resolution spectroscopy
    The triple system HD158926 (λSco) has been observed interferometrically with the Sydney University Stellar Interferometer, and the elements of the wide orbit...
  • Publicación
    Orbital parameters, masses and distance to β Centauri determined with the Sydney University Stellar Interferometer and high-resolution spectroscopy
    The bright southern binary star β Centauri (HR5267) has been observed with the Sydney University Stellar Interferometer (SUSI) and spectroscopically with the...