... signatures[*]
Figures 8-10 and Tables 4-6 are only available in electronic form at http://www.edpsciences.org
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... respectively[*]
For convenience, numerical values are given in average flux density units of Gauss ( $10^{-4}~{\rm Vsm}^{-2}$). To convert to Weber ( $1~{\rm Vs}$), multiply by 3.42 $\times $ 1012.
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Copyright ESO 2005