Journal: Astronomy and Astrophysics

  • Publication
    Velocity fields below the magnetic canopy of solar flux tubes: evidence for high-speed downflows?
    It is well-established that velocities in the immediate surroundings of solar magnetic elements produce an asymmetry in the Stokes V profiles emerging from the...
  • Publication
    Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy
    The transit of Venus in 2004 offered the rare possibility to remotely sense a well-known planetary atmosphere using ground-based absorption spectroscopy...
  • Publication
    Vertical velocities from proper motions of red clump giants
    Aims: We derive the vertical velocities of disk stars in the range of Galactocentric radii of R = 5 - 16 kpc within 2 kpc in height from the Galactic plane...
  • Publication
    Very high energy gamma-ray observation of the peculiar transient event Swift J1644+57 with the MAGIC telescopes and AGILE
    Context. On March 28, 2011, the BAT instrument on board the Swift satellite detected a new transient event that in the very beginning was classified as a gamma...
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    Very high-energy γ-ray observations of novae and dwarf novae with the MAGIC telescopes
    Context. In the last five years the Fermi Large Area Telescope (LAT) instrument detected GeV γ-ray emission from five novae. The GeV emission can be interpreted...
  • Publication
    Very small grain emission in NGC 7023.
    We observed the reflection nebula NGC 7023 at various positions using wide and narrow band photometry centred on the 7.7 and 11.3μm PAH emission features and...
  • Publication
    Very-high-energy gamma-ray observations of the Type Ia Supernova SN 2014J with the MAGIC telescopes
    Context. In this work we present data from observations with the MAGIC telescopes of SN 2014J detected on January 21 2014, the closest Type Ia supernova since...
  • Publication
    VGCF detection of galaxy systems at intermediate redshifts
    We continue the development of our Voronoi Galaxy Cluster Finder (VGCF) technique by applying it to galaxy catalogs obtained with B and R band observations of...
  • Publication
    VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020
    Context. QSO B1420+326 is a blazar classified as a flat-spectrum radio quasar (FSRQ). At the beginning of the year 2020, it was found to be in an enhanced flux...