The authors thank thank J.-M. Malherbe, C. Coutard, R. Hellier, J. Staiger and the German team of the VTT for their active participation in the MSDP observations, as well as L. Harra-Murnion for her comments on the manuscript. LvDG acknowledges the research grant OTKA T026165. Our ground-based campaign had received observing time under the International Time Program offered by the CCI of the Canarian Observatories and supported by the European Commission through the Access to Large Facility "Activity of the Human Capital and Mobility Program". It was also supported by the INSU and the GdR of CNRS "Magnétisme dans les étoiles de type solaire". The authors thank the SOHO/MDI consorsium for the magnetograms, courtesy of C. DeForest. This research was carried out in the framework of the SOHO Guest Investigator program (1998/1999). SOHO is a project of international cooperation between ESA and NASA.
© European Southern Observatory (ESO) 1999
Online publication: February 23, 1999