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Table 5

Dominant rotation periods.

Parameter Value
Subsample 1

Date range (BJD) 2457872–2457915
No. of data points 41
Best Hα sine period (d) 12.2 ± 0.3
False alarm probability 2e−10
Hα rotation phase at T0 0.19 ± 0.18
Ca IRT rotation phase at T0 0.21 ± 0.13
Best Ca IRT sine period (d) 12.2 ± 0.2
False alarm probability 1e−13

Subsample 2

Date range (BJD) 2457915–2457955
No. of data points 21
Best sine period (d) 12.2 ± 0.6
False alarm probability 9e−03
Hα rotation phase at T0 0.64 ± 0.03
Ca IRT rotation phase at T0 0.0b ± 0.6
Best Ca IRT sine period (d) 34b ± 2
False alarm probability 3e−04

Subsample 3

Date range (BJD) 2457955–2458000
No. of data points 23
Best sine period (d) 13.1 ± 0.7
False alarm probability 3e−03
Hα rotation phase at T0 0.02 ± 0.03
Ca IRT rotation phase at T0 0.06 ± 0.02
Best Ca IRT sine period (d) 13.1 ± 0.6
False alarm probability 6e−05

Subsample 5

Date range (BJD) 2458050–2458077
No. of data points 16
Best sine period (d) 11.7 ± 0.7
False alarm probability 1e−04
Hα rotation phase at T0 0.30 ± 0.02
Ca IRT rotation phase at T0 0.39 ± 0.02
Best Ca IRT sine period (d) 11.1 ± 0.6
False alarm probability 1e−03

Notes. (a)T0 denotes the stellar rotation phase at July 1 2017. (b)Visual inspection of the periodogram shows that there are three almost equal strong peaks ranging between 10 and 34 days.

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