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Table A.1.

Assumed and derived parameters.

Parameters from literature Symbol Value Units References / Comment
Period P0 3.52474859 days 1
Transit time BJD0 2 452 826.629283 days 2
Planet-to-star radii ratio Rp/R 0.12175 ± 0.00011 - 3, 4, 5, 6
Normalised semi-major axis a/R 8.807 ± 0.051 - 1, 3, 6, 7
Orbital inclination i 86.744 ± 0.022 deg 3, 6, 7, 8
Transit depth D 14822 ± 28 ppm Calculated from Rp/R
Transit duration T14 0.12840 ± 0.00096 days Calc. from P0, a/R, i, and Rp/R

Fitted parameter priors Symbol Prior* Units Comment

Occultation phase width W 𝒩​(0.03643,0.00054) W = T14/P0
Occultation depth L 𝒰​(1,200) ppm Except visit 5
Impact parameter b 𝒩​(0.5002,0.0090) Calculated from a/R and i
Time of inferior conjunction T0 𝒩​(T0,0.01) days Calculated from P0 and BJD0

Fitted parameter posteriors Symbol Posterior Units Comment

Occultation phase width W 0.0366 ± 0.0003
Occultation depth L 20.4 ± 3.3 ppm
Impact parameter b 0.5000 ± 0.007
Time of inferior conjunction T0 0.156 ± 0.003 days Add 2 459 453 for BJD

Notes. The table shows parameters fixed from the literature and parameters fit using priors, with their posteriors. For the parameters with multiple references, we computed a weighted average. References: (1) Stassun et al. (2017), (2) Bonomo et al. (2017), (3) Evans et al. (2015), (4) Boyajian et al. (2015), (5) Albrecht et al. (2012), (6) Torres et al. (2008), (7) Southworth (2010), (8) Knutson et al. (2007).

*

𝒩 and 𝒰 denote normal and uniform distributions, respectively.

For visit 5, the occultation depth was derived with an unconstraining prior 𝒰​(−∞,∞) because the MCMC analysis did not converge with the constrained one.

Also called mid-transit epoch.

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