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Table 2

Overview of observations taken with the STELLA telescope.

Object Date Filter Ndata texp (s) Cadence (s) rms (mmag) β Airmass
Kepler-94b June 22, 2020 r 188 70 96 1.15 1.00 1.06–1.38
Kepler-94b July 7, 2020 r 128 70 97 1.45 1.00 1.09–1.97
Kepler-94b July 22, 2020 r 136 70 97 1.32 1.43 1.10–1.96

Kepler-63b May 12, 2020 g 93 40 67 1.38 1.09 1.27–1.72
Kepler-63b Aug. 5, 2020 g 157 40 67 2.40 1.59 1.09–1.53
Kepler-63b Oct. 29, 2020 g 178 40 67 2.39 1.00 1.21–2.40

K2-100b Mar. 9, 2020 V 347 15 41 1.77 1.07 1.01–1.24
K2-100b Mar. 14, 2020 V 349 15 41 1.45 1.51 1.01–1.14
K2-100b Dec. 11, 2020 V 270 15 41 1.98 1.03 1.01–1.37
K2-100b Jan. 16, 2021 V 326 15 41 2.03 1.00 1.04–2.48
K2-100b Jan. 21, 2021 V 310 15 41 1.49 1.04 1.03–2.39

K2-138b Oct. 16, 2019 r 135 60 90 1.10 1.00 1.29–1.55
K2-138b Oct. 23, 2019 r 117 60 90 1.25 1.11 1.29–2.16
K2-138b&e Nov. 18, 2019 r 184 60 86 0.92 1.22 1.29–1.88
K2-138b Aug. 12, 2020 r 129 60 86 1.24 1.00 1.29–1.73
K2-138b Aug. 19, 2020 r 88 60 86 1.23 1.00 1.32–1.82
K2-138c Nov. 27, 2019 r 142 60 86 0.93 1.31 1.29–2.12
K2-138c Oct. 23, 2020 r 185 60 87 1.26 1.00 1.29–2.26
K2-138c Nov. 17, 2020 r 169 60 86 1.11 1.04 1.29–1.87

Notes. The columns provide the observing date, the number of the observed individual data points, the exposure time, the observing cadence, the dispersion of the data points as root mean square (rms) of the observations after subtracting a transit model and a detrending function, the β factor (see Sect. 4), and the airmass range of the observations.

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