Now showing items 7-11 of 11

    • S5 1803+78 Revisited 

      Author: Nesci , R.; Maselli , A.; Montagni , F.; Sclavi , S.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      We report on our optical monitoring of the BL Lac object S5 1803+78 from 1996 to 2011. The source showed no clear periodicity, but a time scale of about 1 300 days between major flares is possibly present. No systematic ...
    • Structural Variability of 3C 111 on Parsec Scales 

      Author: Grossberger , C.; Kadler , M.; Wilms , J.; Müller , C.; Beuchert , T.; Ros , E.; Ojha , R.; Aller , M.; Aller , H.; Angelakis , E.; Fuhrmann , L.; Nestoras , I.; Schmidt , R.; Zensus , J. A.; Krichbaum , T. P.; Ungerechts , H.; Sievers , A.; Riquelme , D.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      We discuss the parsec-scale structural variability of the extragalactic jet 3C111 related to a major radio flux density outburst in 2007. The data analyzed were taken within the scope of the MOJAVE, UMRAO, and F-GAMMA ...
    • The Intriguing Nature of the Cataclysmic Variable SS Cygni 

      Author: Giovannelli , F.; Sabau-Graziati , L.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The classification of SS Cyg as a dwarf nova (DN), a subclass of the non–magnetic (NM) cataclysmic variable (CV) has been considered by most of the community as well established because of a paper appeared in Nature (Bath ...
    • The Optical Transient Search in the Bamberg Southern Sky Survey: Preliminary Results 

      Author: Hudec , R.; Kopel , F.; Krapp , P.; Heber , U.; Cayé , W.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      A large fraction of gamma-ray bursts temporarily emit optical light, i.e. optical afterglows and optical transients. So far, optical transients have only been detected after related gamma-ray satellite detection. However, ...
    • Ultra Low Dispersion Spectroscopy with Gaia and Astronomical Slitless Surveys 

      Author: Hudec , R.; Hudec , L.; Klíma , M.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      The ultra-low dispersion spectroscopy to be applied in the ESA Gaia space observatory and the ground-based objective-prism plate surveys represent a similar type of astrophysical data. Although the dispersion in plate ...