TESS unveils the phase curve of WASP-33b - Characterization of the planetary atmosphere and the pulsations from the star

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Table 4

Best-fit values and 1σ uncertainties for the parameters accompanying, among others, the Mandel & Agol (2002) model, a∕R_S, i, R_P /R_S, P, and T₀, the phase curve, c₀, c₁, and c₂, and the scaling factor of the secondary eclipse model, SF.

Parameter	M1	M2	M3	M4
a∕R_S	3.601 ± 0.005	3.600 ± 0.005	3.603 ± 0.005	3.600 ± 0.005
i (°)	88.53 ± 0.21	88.53 ± 0.22	88.52 ± 0.22	88.52 ± 0.23
R_P/R_S	0.1087 ± 0.0002	0.1087 ± 0.0002	0.1086 ± 0.0002	0.1087 ± 0.0002
P (days)	1.2198705 ± 3.7 × 10⁻⁶	1.2198706 ± 3.7 × 10⁻⁶	1.2198706 ± 3.9 × 10⁻⁶	1.2198704 ± 3.8 × 10⁻⁶
T₀ (BJD_TDB)	2 458 792.63405 ± 0.00006	2 458 792.63405 ± 0.00006	2 458 792.63405 ± 0.00005	2 458 792.63405 ± 0.00005

c₀ (ppm)	1 ± 10	3 ± 10	−56 ± 19	−9 ± 12
c₁ (ppm)	45.4 ± 12.2	47.4 ± 10.7	52.8 ± 12.2	48.3 ± 12.1
c₂ (ppm)	87.7 ± 15.1	90.5 ± 14.9	87.4 ± 13.1	88.1 ± 13.4
SF	0.0189 ± 0.0027	0.0270 ± 0.0031	0.0220 ± 0.0035	0.0258 ± 0.0030

ED (ppm)	223.9 ± 31.0	320.4 ± 37.2	259.4 ± 41.0	305.8 ± 35.5
A (ppm)	98.7 ± 14.7	102.1 ± 14.1	102.1 ± 12.8	100.4 ± 13.1
ϕ_off (°)	27.3 ± 7.6	27.7 ± 6.6	31.1 ± 7.0	28.7 ± 7.1
M_P (M_J)	–	–	5.7 ± 1.2	2.81 ± 0.53

χ	17 273	16 101	17 269	16 100
BIC	17 359	16 187	17 364	16 192
	1.2316	1.1541	1.2314	1.1541
Degrees of freedom	9	9	10	10

Notes. In addition, the amplitude of the phase curve, A, the ED, and the offset between the region of maximum brightness and the substellar point, ϕ_off. Values are given, from left to right, for M1, M2, M3, and M4.

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