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Fig. 2

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Average longitudinal magnetic field variation of HD 144941 from measurements of the whole spectrum, phased by the 13.93 days period derived by Jeffery & Ramsay (2018) from the K2 light curve. The zero point is given by our first measurement, coinciding close to the maximum of the magnetic field strength. We note the repetition of the data below phase 0 and above phase 1 for visualisation purposes.

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