Comment on "A large excess in apparent solar oblateness due to surface magnetism".

Kuhn, J R; Emilio, M; Bush, R · Science · 2009

editorial · Level V

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Abstract

Fivian et al. (Reports, 24 October 2008, p. 560) analyzed data from the Reuven Ramaty High-Energy Solar Spectroscopic Imager satellite and reported that the Sun is more oblate than previous measurements have suggested. We argue that their threshold-based analysis yields a biased measure of the solar limb shape geometry.