Amplitude of solar cycle brightness change, here the difference between annually averaged solar brightness in 2000 (cycle max) and 2008 (cycle min) calculated with the SATIRE model (black). In addition, we plot the facular and spot components of the brightness change (red and blue). The grey shaded area indicates the spectral response function of the Kepler telescope measurements and the yellow shaded areas the Strömgren filters b and y (centred at 467 nm and 547 nm, respectively). Solid lines: Solar cycle brightness change calculated with the newest ATLAS9 code and ODFs. Dotted lines: Same, but using emergent spectra calculated by Unruh et al. (1999).
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