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Table E.2

Summary of the results of fitting model (2) to the modulations of the amplitude A1 of the first harmonic.

CEP A1 ΔA1 ΔA1c
[mag] [10−6 mag∕d] [10−6 mag∕d] [1∕d] [mmag] [mmag] [mmag]
FU Cepheids with twin peaks
1140 0.2202 –1.255 0.153 0.00037 1.92 0.17 2.06
1418 0.1207 0.065 0.155 0.00088 0.63 0.07 1.06
1621 0.2183 0.335 0.120 0.00037 2.91 0.14 3.12
1748 0.2241 –2.057 0.207 0.00049 1.17 0.16 1.38
1833 0.2679 –0.607 0.335 0.00150 0.65 0.12 3.22
1932 0.2083 –1.598 0.100 0.00027 2.27 0.21 2.28
1998 0.2083 –0.309 0.165 0.00081 0.78 0.09 1.21
2132 0.1638 –0.612 0.101 0.00039 1.03 0.12 1.12
2180 0.2174 –1.150 0.172 0.00078 0.92 0.10 1.39
2191 0.2353 0.944 0.212 0.00096 1.07 0.13 1.95
2289 0.1916 –0.533 0.145 0.00076 1.35 0.10 1.99
2470 0.2118 0.648 0.199 0.00073 1.34 0.11 1.93
FO Cepheids with twin peaks
1405 0.1073 1.529 0.277 0.00032 4.69 0.34 4.86
1521 0.0897 –0.804 0.213 0.00074 1.57 0.13 2.27
1527 0.0647 –2.419 0.409 0.00051 10.54 0.42 12.59
1535 0.0637 –1.056 1.777 0.00074 15.42 0.98 22.22
1536 0.0251 –2.358 0.591 0.00042 10.93 0.53 12.14
1561 0.1282 –0.834 0.165 0.00054 2.39 0.15 2.91
1564 0.0746 –0.459 0.119 0.00181 0.21 0.03 NA
1605 0.1145 0.136 0.170 0.00061 1.13 0.12 1.45
1693 0.0853 1.085 0.179 0.00078 0.82 0.08 1.24
1704 0.0892 0.282 0.189 0.00118 0.59 0.07 1.45
2118 0.0870 0.199 0.172 0.00096 0.73 0.06 1.32
2217 0.0634 0.668 0.159 0.00025 2.50 0.25 2.47
FO Cepheids with visible changing amplitudes
0916 0.0425 –9.139 1.425 0.00042 18.35 1.09 20.42
1119 0.0357 2.908 1.946 0.00076 14.92 0.84 22.02
1275 0.0439 1.149 0.998 0.00039 23.16 0.90 25.27
1955 0.0530 0.486 0.574 0.00025 9.20 0.66 9.09
2820 0.1109 1.236 0.306 0.00026 5.73 0.32 5.72
FU Cepheids without twin peaks
0727 0.2403 –0.858 0.149 0.00068 0.71 0.09 0.97
1514 0.1870 –0.068 0.100 0.00029 1.35 0.14 1.38
1543 0.0832 –0.046 0.090 0.00066 0.63 0.07 0.86
1559 0.1811 –0.109 0.121 0.00066 0.91 0.08 1.23
1711 0.0518 –1.498 0.137 0.00047 0.87 0.10 1.00
1753 0.1584 –0.099 0.146 0.00071 0.90 0.11 1.26
2215 0.1937 –0.263 0.144 0.00025 1.29 0.22 1.28
2229 0.2218 –0.128 0.122 0.00154 0.35 0.04 NA
2264 0.1168 –0.208 0.212 0.00076 0.77 0.11 1.13
2500 0.1852 0.250 0.123 0.00031 1.44 0.12 1.49
2580 0.1833 –0.682 0.157 0.00051 1.10 0.10 1.31
2774 0.1275 –0.357 0.226 0.00121 0.61 0.07 1.57
FO Cepheids without twin peaks
1582 0.0410 1.055 0.453 0.00034 4.38 0.56 4.62
1638 0.0105 0.842 0.142 0.00132 0.42 0.04 1.34
1671 0.0597 –0.240 0.201 0.00088 1.05 0.09 1.75
1698 0.0838 0.157 0.152 0.00078 1.12 0.09 1.68
1754 0.0842 0.309 0.397 0.00103 0.88 0.13 1.76
1772 0.0851 0.047 0.166 0.00032 1.85 0.17 1.92
1838 0.0612 0.091 0.104 0.00130 0.26 0.03 0.78
1911 0.0968 0.733 0.262 0.00086 1.38 0.17 2.24
1937 0.0906 –0.807 0.116 0.00100 0.48 0.06 0.92
2103 0.0365 –2.420 0.540 0.00047 4.09 0.73 4.71
2310 0.0862 0.922 0.135 0.00034 2.79 0.20 2.94
2977 0.0461 1.426 0.374 0.00060 3.33 0.21 4.27

Notes. , and ΔA1: the trend, the oscillation frequency and the oscillation period of A1 (see Sect. 4.1); and : standard error of and ΔA1; ΔA1c: the bias-corrected estimate of the amplitude of the modulation.

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