Fig. 1.
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Portion of the spectrum of HD 213258 recorded on HJD 2,459,180.728 in Stokes I (top) and V (bottom), showing the resolved magnetically split line Fe IIλ 6149.2 Å. A few other lines that are typical of Ap stars are identified. The spectrum has been normalised to the continuum (Ic), and the wavelength scale has been converted to the laboratory reference frame.
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