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Fig. A.1.


Top panel: power spectrum of the short-cadence Kepler data in the region of the eigenfrequency multiplet centred around the frequency νn=24,l=2,m=0. The black and red lines show respectively the data and the best-fit model of the power spectrum. The vertical red ticks mark the frequencies of the eigenmodes of the multiplet, for −2 ≦ m ≦ 2 . Bottom panel: splitting diagram for the multiplet. The first two terms of the splitting sequence correspond to the rotational effects, while β(ν) is an additional term that describes aspherical contributions to the eigenfrequencies. The red horizontal ticks correspond to those seen in the bottom panel.

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