Confirmation and characterisation of three giant planets detected by TESS from the FIES/NOT and Tull/McDonald spectrographs

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Table A.7

Limb-darkening coefficients for TOI-1820.

	TOI-1820
	Initial		Results
	q₁	q₂	q₁	q₂
TESS	0.2986	0.2806	0.26 ± 0.03	0.25 ± 0.03
LCO HAL i′	0.3815	0.1936
LCO McD B	0.7104	0.1172
LCO McD z-short	0.3152	0.1968	0 33 ± 0 04	0.21 ± 0.04
LCO SSO z-short	0.3152	0.1968	0.32 ± 0.05	0.21 ± 0.05

The initial and resulting values for the linear, q₁, and quadratic, q₂, limb− darkening coefficients from the different photometric systems. In our MCMC we step in the sum, q₁ + q₂, while applying a Gaussian prior with a width of 0.1 and keeping the difference, q₁ − q₂, fixed.

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