VSOP Observations of the Blazar S5 2007+77
  The blazar, S5 2007+77 shows intraday variability in cm wavelengths. Seven epochs of VSOP observations were carried out in 1998 and 1999 at 5 GHz to look for the origin of the variability with the highest achievable angular resolution at cm wavelengths. Here the results of four epochs are analysed, which revealed ~10% variations in polarized flux density. 
K. E. Gabanyi, T. P. Krichbaum, A. Kraus, A. Witzel, J.A. Zensus