Fig. 1
Deep I Hα line core (upper curve) and observed V/I circular polarisation spectrum (lower curve) of WD 2047+372, binned over intervals of 0.2 Å and arbitrarily normalised. The V/I spectrum is moved upwards by +0.4 vertical units to facilitate comparison with the I spectrum. We also plot the ± 1σ level of photon noise bracketting the observed V/I spectrum, both lines also shifted upwards by +0.4.
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