7 Acknowledgements

Support by the Hungarian Science Research Fund (OTKA grant no. K67746), by the European Commission’s 6th Framework Programme (SOLAIRE Network, MTRN-CT-2006-035484) as well as by the European Union with the co-financing of the European Social Fund (grant no. TÁMOP-4.2.1/B-09/1/KMR-2010-0003) is gratefully acknowledged.

Wilcox Solar Observatory data used in this study was obtained via the web site External Linkhttp://wso.stanford.edu/, courtesy of J.T. Hoeksema. The Wilcox Solar Observatory is currently supported by NASA.

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