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Table 1

Frequencies and amplitudes in the Strömgren v and y filters.

Frequency Mode or ID Amplitude in millimag
cd-1 μHz 2006/7 2007/8 2008/9 2009/10
v y v y v y v y
Dominant modes ±0.2 ±0.2 ±0.3 ±0.2 ±0.2 ±0.2 ±0.2 ±0.1
f 1 4.9335 57.101 56.7 36.2 56.6 35.6 56.6 36.2 56.9 36.1
f 2 5.2138 60.345 31.2 19.8 31.4 20.0 31.9 20.3 32.0 20.6
f 3 8.3329 96.445 10.3 6.6 14.4 9.5 16.0 10.4 16.8 10.8
Additional modes: annual solutions
f 4 4.3201 50.001 2.8 2.1 3.0 1.7 3.2 2.1 3.3 1.9
f 5 4.7645 55.144 3.9 2.7 4.5 2.8 4.2 2.9 3.7 2.3
f 6 4.9375 57.147 7.0 4.5 6.9 4.3 6.9 4.4 6.3 4.2
f 7 7.911 91.51 4.3 2.8 8.4 5.1 5.61 3.41 4.4 3.0
f 8 8.2653 95.664 3.3 2.1 4.0 2.6 3.8 2.6 3.8 2.6
f 9 8.4559 97.869 6.9 4.4 5.6 3.5 4.9 3.5 6.7 4.5
f 10 9.4761 109.677 3.3 2.1 5.5 3.9 6.7 4.3 4.3 2.7
f 11 9.8398 113.886 9.5 6.2 5.8 3.8 4.2 2.7 9.9 6.7
f 12 11.0339 127.707 1.9 1.1 2.5 1.6 5.4 3.7 5.1 3.4
Additional modes: overall solution ±0.1 ±0.1
f 13 3.4467 39.893 1.0 0.6
f 14 4.7787 55.310 1.8 1.2
f 15 5.3207 61.582 1.6 1.0
f 16 6.0243 69.725 0.8 0.6
f 17 6.2038 71.803 2.5 1.5
f 18 6.8304 79.056 1.1 0.8
f 19 7.0153 81.195 1.4 0.9
f 20 7.3735 85.341 1.5 0.9
f 21 7.6653 88.719 2.5 1.6
f 22 8.0540 93.218 0.8 0.6
f 23 8.1492 94.319 1.8 1.3
f 24 8.5120 98.519 2.2 1.3
f 25 9.5481 110.510 2.8 1.6
f 26 9.8671 114.202 2f1 3.5 2.4
f 27 9.9590 115.266 2.3 1.5
f 28 10.1143 117.063 1.2 0.8
f 29 10.1474 117.447 f1+f2 4.2 2.8
f 30 10.3179 119.420 1.7 1.2
f 31 10.3427 119.707 1.3 0.8
f 32 10.3986 120.354 1.3 0.8
f 33 10.7708 124.662 1.8 1.0
f 34 10.8459 125.531 1.5 1.0
f 35 10.8748 125.866 1.7 1.0
f 36 11.0201 127.547 1.1 0.8
f 37 11.3210 131.031 1.4 0.9
f 38 11.4743 132.804 1.1 0.7
f 39 12.7113 147.122 1.2 0.7
f 40 13.2664 153.546 f1+f3 1.0 0.7

Notes.

(1)

The mode at 7.91 cd-1 showed a slightly variable frequency from year to year. We have adopted 7.9051 cd-1 (2006/7), 7.9065 cd-1 (2007/8), 7.9067 cd-1 (2008/9), and 7.9081 cd-1 (2009/10). During the 160d observing season in 2008/9, the amplitudes were systematically increasing from 3 to 9 mmag in v and 2 to 6 mmag in y.

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