Table 2: Results of harmonic fits to the Geneva lightcurves of HD 203664. A stands for the amplitude, expressed in millimag, and $\phi $ for the phase, expressed in 2$\pi $ radians. The adopted reference epoch for $\phi =0.0$corresponds to HJD 2 450 000.0.
    U B1 B B2 V1 V G
f1 A 36.3 $\pm$ 0.7 32.5 $\pm$ 0.8 31.7 $\pm$ 0.7 31.4 $\pm$ 0.7 30.0 $\pm$ 0.8 30.0 $\pm$ 0.7 29.1 $\pm$ 0.8
  $\phi $ 0.077 $\pm$ 0.001 0.078 $\pm$ 0.001 0.078 $\pm$ 0.001 0.077 $\pm$ 0.001 0.079 $\pm$ 0.001 0.075 $\pm$ 0.001 0.077 $\pm$ 0.002
f2 A 4.2 $\pm$ 0.7 3.9 $\pm$ 0.6 3.9 $\pm$ 0.6 4.0 $\pm$ 0.7 3.7 $\pm$ 0.7 4.2 $\pm$ 0.6 3.6 $\pm$ 0.6
  $\phi $ -0.210 $\pm$ 0.026 -0.226 $\pm$ 0.027 -0.226 $\pm$ 0.024 -0.199 $\pm$ 0.028 -0.209 $\pm$ 0.031 -0.225 $\pm$ 0.023 -0.240 $\pm$ 0.029
f3 A 3.7 $\pm$ 0.8 3.6 $\pm$ 0.8 3.5 $\pm$ 0.7 3.5 $\pm$ 0.7 2.7 $\pm$ 0.7 3.0 $\pm$ 0.7 1.8 $\pm$ 0.7
  $\phi $ 0.172 $\pm$ 0.010 0.165 $\pm$ 0.009 0.166 $\pm$ 0.009 0.189 $\pm$ 0.014 0.205 $\pm$ 0.024 0.189 $\pm$ 0.016 0.238 $\pm$ 0.051
variance 93.2% 91.2% 92.5% 91.3% 89.3% 91.1% 87.7%
reduction              


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