Fig. 1.
Superposed power for the LOI data: power averaged over 15 modes centred on the l = 0 modes: (top, green) for a fixed large separation of 136 μHz; (bottom, black) for an optimised large separation of 134.7 μHz linearly dependent on frequency. The original power spectrum, smoothed to ten bins, is taken from one year of data of the Luminosity Oscillations Imager seeing the Sun as a star (Appourchaux et al. 1997).
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