Fig. 3
StokesQ (blue), U (red), and from the V measurements N1 (continuous)and N2 (dashed) LSD profiles of Betelgeuse for April 08, 2014 (left) and December 18, 2014 (right) obtained with Narval. Small vertical lines represent typical error bars with the same color code. We note that the N1,2 signals have been multiplied by a factor −20.
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