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## Table 1

First 24 frequencies identified in the amplitude spectrum (those with an amplitude  >0.3 mmag).

 Term Frequency Ampl. Possible combination [d-1] [μHz] [mmag] terms f1 17.1617 198.630 12.961 f16 = 2f1, f365 = 3f1 f2 13.0499 151.040 2.342 f87 = f1 + f2, f104 = f1 − f2 f726 = 2f2 f3 16.2507 188.086 1.736 f82 = f1 + f3 f4 16.0024 185.212 1.593 f85 = f1 + f4, f150 = f1 − f4 f5 8.1366 94.173 1.544 f96 = f1 + f5, f447 = 2f5, f597 = 3f5 f6 13.6605 158.107 1.313 f95 = f1 + f6, f190 = f1 − f6 f7 7.1320 82.546 0.974 f356 = f1 + f7, f554 = 2f7, f721 = 3f7 f8 15.1787 175.678 0.979 f136 = f1 + f8 f9 17.2805 200.005 0.903 f167 = f1 + f9, f187 = f9 − f1 f10 7.6604 88.661 0.824 f115 = 2f10, f178 = f1 + f10 f11 15.0390 174.061 0.836 f12 16.2473 188.046 0.819 f13 17.1863 198.914 0.692 f14 15.8344 183.267 0.726 f15 15.8217 183.120 0.707 f16 13.9725 161.718 0.792 f17 34.3232 397.257 0.501 f18 14.0608 162.740 0.471 f19 8.7541 101.320 0.390 f20 7.8843 91.253 0.384 f269 = 2f20, f284 = 3f20 f21 18.4425 213.453 0.377 f22 8.2945 96.001 0.371 f23 7.5452 87.328 0.324 f60 = 2f23 f24 8.8886 102.877 0.308 f70 = 2f24, f505 = 3f24

Notes. The last colum indicates possible combination terms also present in the data.

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