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Table 2

Model parameters used in the transit analysis when comparing different noise models.

Parameter Symbol Prior Correct value (a) Units
Planet parameters
Orbital period P ℱ (365.25) 365.25 days
Transit time T0 𝓤(0.48,0.52) 0.4995–0.5005 (b) days
Planet-to-star radius ratio Rp/R 𝓤(0.0,0.02) 0.009168 -
Scaled semi-major axis (R + Rp)/a 𝓤(0.0,0.02) 0.004693
Cosine of inclination cos(i) 𝓤(0.0,0.006) varying
White noise term σW 𝓤(45,6738) varying ppm

Stellar parameters
Stellar mass M ℱ (1.0) 1.0 M
Stellar radius R ℱ (1.0) 1.0 R
Limb-darkening coefficients q1 𝒩 (0.392, 0.0085)
q2 𝒩 (0.322, 0.0117)

Matérn-3/2 GP
Amplitude ln(σ) 𝓤(−20, −1)
Length scale parameter ln(ρ) 𝓤(−15, 5)

SHO GP
Scaled amplitude ln(S0) 𝒩(−26.79, 0.04)
Quality factor ln(Q) 𝒩 (−0.402, 0.025)
Angular Frequency ln(ω0) 𝒩(6.932, 0.011)

Notes. The Gaussian priors with meanµ and standard deviation σ are displayed as 𝒩(µ, σ). 𝓤(Ul, Uu) represents an uniform prior with Ul and Uu as lower and upper limits respectively. ℱ describes a fixed value. (a)Value of the injected transit signal. (b)The injected transit mid-time is always the exact middle of the dataset, which varies accross the different observations according to the exact observation times of the HMI images.

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