Publication type: Refereed

  • Publication
    Type I X-ray bursts, burst oscillations and kHz quasi-periodic oscillations in the neutron star system IGRJ17191-2821
    We present a detailed study of the X-ray energy and power spectral properties of the neutron star transient IGRJ17191-2821. We discovered four instances of...
  • Publication
    Type Ia supernovae with and without blueshifted narrow Na I D lines - how different is their structure?
    In studies on intermediate- and high-resolution spectra of Type Ia supernovae (SNe Ia), some objects exhibit narrow Na I D absorptions often blueshifted with...
  • Publication
    Type-II surface brightness profiles in edge-on galaxies produced by flares
    Previous numerical studies had apparently ruled out the possibility that flares in galaxy discs could give rise to the apparent breaks in their luminosity...
  • Publication
    Ubiquitous hundred-Gauss magnetic fields in solar spicules
    Aims: We aim to study the magnetic field in solar spicules using high-resolution spectropolarimetric observations in the Ca II 8542 Å line obtained with the...
  • Publication
    Ubiquitous quiet-Sun jets
    Context. IMaX/Sunrise has recently reported the temporal evolution of highly dynamic and strongly Doppler shifted Stokes V signals in the quiet Sun. Aims: We...
  • Publication
    Ubiquitous seeding of supermassive black holes by direct collapse
    We study for the first time the environment of massive black hole (BH) seeds (˜104-5 M⊙) formed via the direct collapse of pristine gas clouds in massive haloes...
  • Publication
    UBRI photometry of globular clusters in the Leo group galaxy NGC 3379
    We present wide-area UBRI photometry for globular clusters around the Leo group galaxy NGC 3379. Globular cluster candidates are selected from their B-band...
  • Publication
    UBV(RI)C photometry of the open clusters Be 15, Be 80 and NGC 2192
    The three open clusters Be 15, Be 80 and NGC 2192 have been observed using CCD UBV(RI)C photometry at the San Pedro Mártir Observatory, México within the...
  • Publication
    UBVRI observations of BL Lacertae objects
    A total of 85 UBVRI observations of BL Lac objects is presented. For most of them, an average continuum can be traced by means of well-defined color indices...