Journal: Astronomy and Astrophysics

  • Publication
    Open cluster Dolidze 25: Stellar parameters and the metallicity in the Galactic anticentre
    Context. The young open cluster Dolidze 25, in the direction of the Galactic anticentre, has been attributed a very low metallicity, with typical abundances...
  • Publication
    Opening PANDORA's box: APEX observations of CO in PNe
    Context. Observations of molecular gas have played a key role in developing the current understanding of the late stages of stellar evolution. Aims: The survey...
  • Publication
    Optical analysis of the poor clusters Abell 610, Abell 725, and Abell 796, containing diffuse radio sources
    Aims: We study the dynamical status of the poor, low X-ray luminous galaxy clusters Abell 610, Abell 725, and Abell 796 (at z = 0.1, 0.09, and 0.16...
  • Publication
    Optical and EUV observations of solar flare kernels
    We present high-resolution spectral observations, covering the entire optical region (3800-9000 Å), of a solar flare observed during a multi-wavelength campaign...
  • Publication
    Optical and near-infrared follow-up observations of GRB980329
    We imaged the field of GRB980329 in the optical and in the near-infrared starting 20 hours after the event, at the ESO NTT, at the NOT, at the APO and at the...
  • Publication
    Optical and near-infrared spectroscopy of the black hole transient 4U 1543-47 during its 2021 ultra-luminous state
    We present simultaneous optical and near-infrared spectra obtained during the 2021 outburst of the black hole transient 4U 1543-47. The X-ray hardness-intensity...
  • Publication
    Optical and radio variability of the BL Lacertae object AO 0235+16: A possible 5-6 year periodicity
    The BL Lacertae object AO 0235+16 is well known for its extreme optical and radio variability. New optical and radio data have been collected in the last four...
  • Publication
    Optical dropout galaxies lensed by the cluster A2667
    Context. We investigate the nature and the physical properties of ten z, Y, and J-dropout galaxies selected in the field of the lensing cluster A2667. Aims...
  • Publication
    Optical follow-up of ROSAT discovered candidate members of the open cluster Coma Berenices
    We have carried out an optical follow-up of twelve ROSAT discovered candidate members of the Coma Berenices open cluster. VRI photometry and low resolution ( ~...