Jan Rybak,
Ales Kucera,
Peter Gomory,
Julius Koza -
Astronomical Institute, Slovak Academy of Sciences, Tatranska Lomnica, Slovakia
Hubertus Woehl,
Oskar Steiner -
Kiepenheuer Institut fuer Sonnenphysik, Freiburg, Germany
Arnold Hanslmeier -
IGAM/Institute of Physics, University of Graz, Graz, Austria
with help of
Christian Beck (IAC, LA Laguna, Spain) and Oliver Wiloth (KIS, Freiburg, Germany)