TESS unveils the optical phase curve of KELT-1b - Thermal emission and ellipsoidal variation from the brown dwarf companion along with the stellar activity

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Table 1

Best-fit transit parameters obtained from TESS photometry (this work), for a circular orbit (first column) and an eccentric orbit (second column), compared to those determined by Beatty et al. (2019).

Parameter	This work	This work	Beatty et al. (2019)
	circular orbit	eccentric orbit	for comparison
a∕R_S	3.630 ± 0.051	3.652 ± 0.046	3.693 ± 0.038
i (°)	87.2 ± 1.6	87.5 ± 1.4	86.8 ± 0.8
R_P∕R_S	0.07688 ± 0.00040	0.07704 ± 0.00029	0.0771 ± 0.0003
P (days)	1.2174928 ± 2.7 × 10⁻⁶	1.2174928 ± 3.3 × 10⁻⁶	1.2174928 ± 6 × 10⁻⁷
T_c (BJD_TDB)	8764.31647 ± 0.00018	–	7306.97602 ± 0.0003
T_peri	–	8764.61506 ± 0.00028	–
ω (deg)	270	358	358 ± 51
e	0	0.0013	0.0013 ± 0.0005
χ²	1566	1695	–

Notes. When uncertainties are not given, it means that the parameter was considered as fixed. T_c and T_peri are given −2 450 000 days.

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