Dark skies of the slightly eccentric WASP-18 b from its optical-to-infrared dayside emission

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Table I.1

Values of the systematic parameters for CHEOPS.

Background	a _bkg [ppm] $515_{- 187}^{+ 186}$ ${515}_{-{187}}^{+{186}}$	b _bkg [ppm] 695 ± 96
Roll angle	σ_GP [ppm] ${107.3}_{- 5.8}^{+ 6.4}$ ${107.3}_{-{5.8}}^{+{6.4}}$	ρ_GP [deg] ${23.8}_{- 2.5}^{+ 2.8}$ ${23.8}_{-{2.5}}^{+{2.8}}$
	σ_w [ppm]	f ₀	c ₁ [day⁻¹]
Visit 01	$120_{- 30}^{+ 26}$ ${120}_{-{30}}^{+{26}}$	{0.999843 ± 0.000054}	–
Visit 02	$126_{- 27}^{+ 24}$ ${126}_{-{27}}^{+{24}}$	0.999802 ± 0.000053	–
Visit 03	$86_{- 50}^{+ 31}$ ${86}_{-{50}}^{+{31}}$	${0.999789}_{- 0.000052}^{+ 0.000051}$ ${0.999789}_{-{0.000052}}^{+{0.000051}}$	${0.00067}_{- 0.00020}^{+ 0.00021}$ ${0.00067}_{-{0.00020}}^{+{0.00021}}$
Visit 04	$126_{- 27}^{+ 24}$ ${126}_{-{27}}^{+{24}}$	0.999791 ± 0.000050	–
Visit 05	$138_{- 25}^{+ 23}$ ${138}_{-{25}}^{+{23}}$	0.999806 ± 0.000051	–
Visit 06	$20_{- 58}^{+ 53}$ ${20}_{-{58}}^{+{53}}$	${0.999786}_{- 0.000051}^{+ 0.000052}$ ${0.999786}_{-{0.000051}}^{+{0.000052}}$	–
Visit 07	$90_{- 43}^{+ 29}$ ${90}_{-{43}}^{+{29}}$	${0.999778}_{- 0.000049}^{+ 0.000050}$ ${0.999778}_{-{0.000049}}^{+{0.000050}}$	–
Visit 08	$122_{- 27}^{+ 24}$ ${122}_{-{27}}^{+{24}}$	0.999775 ± 0.000050	–
Visit 09	$128_{- 25}^{+ 23}$ ${128}_{-{25}}^{+{23}}$	${0.999806}_{- 0.000050}^{+ 0.000051}$ ${0.999806}_{-{0.000050}}^{+{0.000051}}$	${- 0.00088}_{- 0.00021}^{+ 0.00022}$ ${-0.00088}_{-{0.00021}}^{+{0.00022}}$
Visit 10	$71_{- 65}^{+ 39}$ ${71}_{-{65}}^{+{39}}$	${0.999741}_{- 0.000051}^{+ 0.000050}$ ${0.999741}_{-{0.000051}}^{+{0.000050}}$	–
Visit 11	$26_{- 57}^{+ 49}$ ${26}_{-{57}}^{+{49}}$	0.999764 ± 0.000049	–
Visit 12	$114_{- 28}^{+ 24}$ ${114}_{-{28}}^{+{24}}$	0.999808 ± 0.000049	–
Visit 13	$110_{- 31}^{+ 26}$ ${110}_{-{31}}^{+{26}}$	${0.999780}_{- 0.000050}^{+ 0.000049}$ ${0.999780}_{-{0.000050}}^{+{0.000049}}$	–
Visit 14	$49_{- 65}^{+ 46}$ ${49}_{-{65}}^{+{46}}$	${0.999777}_{- 0.000051}^{+ 0.000050}$ ${0.999777}_{-{0.000051}}^{+{0.000050}}$	–
Visit 15	$119_{- 29}^{+ 26}$ ${119}_{-{29}}^{+{26}}$	1.000084 ± 0.000055	–
Visit 16	$22_{- 56}^{+ 52}$ ${22}_{-{56}}^{+{52}}$	${0.999740}_{- 0.000051}^{+ 0.000052}$ ${0.999740}_{-{0.000051}}^{+{0.000052}}$	–
Visit 17	$87_{- 50}^{+ 31}$ ${87}_{-{50}}^{+{31}}$	0.999772 ± 0.000051	–
Visit 18	$101_{- 33}^{+ 26}$ ${101}_{-{33}}^{+{26}}$	1.000101 ± 0.000051	–
Visit 19	$101_{- 33}^{+ 26}$ ${101}_{-{33}}^{+{26}}$	1.000062 ± 0.000050	–
Visit 20	$110_{- 23}^{+ 20}$ ${110}_{-{23}}^{+{20}}$	0.999665 ± 0.000049	–
Visit 21	145 ± 18	${0.999678}_{- 0.000049}^{+ 0.000050}$ ${0.999678}_{-{0.000049}}^{+{0.000050}}$	–
Visit 22	$78_{- 40}^{+ 26}$ ${78}_{-{40}}^{+{26}}$	${0.999679}_{- 0.000049}^{+ 0.000048}$ ${0.999679}_{-{0.000049}}^{+{0.000048}}$	–
Visit 23	$87_{- 47}^{+ 30}$ ${87}_{-{47}}^{+{30}}$	${1.000013}_{- 0.000049}^{+ 0.000050}$ ${1.000013}_{-{0.000049}}^{+{0.000050}}$	–
Visit 24	$75_{- 50}^{+ 29}$ ${75}_{-{50}}^{+{29}}$	0.999891 ± 0.000049	–
Visit 25	$73_{- 46}^{+ 28}$ ${73}_{-{46}}^{+{28}}$	${0.999661}_{- 0.000050}^{+ 0.000049}$ ${0.999661}_{-{0.000050}}^{+{0.000049}}$	–
Visit 26	$100_{- 23}^{+ 20}$ ${100}_{-{23}}^{+{20}}$	0.999664 ± 0.000049	–
Visit 27	$94_{- 38}^{+ 27}$ ${94}_{-{38}}^{+{27}}$	1.000069 ± 0.000049	–
Visit 28	$145_{- 22}^{+ 21}$ ${145}_{-{22}}^{+{21}}$	${0.999895}_{- 0.000050}^{+ 0.000051}$ ${0.999895}_{-{0.000050}}^{+{0.000051}}$	–
Visit 29	176 ± 17	0.999659 ± 0.000049	–
Visit 30	$80_{- 62}^{+ 37}$ ${80}_{-{62}}^{+{37}}$	0.999937 ± 0.000056	–
Visit 31	$72_{- 49}^{+ 29}$ ${72}_{-{49}}^{+{29}}$	0.999928 ± 0.000049	0.00037 ± 0.00012
Visit 32	$35_{- 56}^{+ 43}$ ${35}_{-{56}}^{+{43}}$	0.999888 ± 0.000050	${0.00101}_{- 0.00014}^{+ 0.00015}$ ${0.00101}_{-{0.00014}}^{+{0.00015}}$
Visit 33	$100_{- 14}^{+ 13}$ ${100}_{-{14}}^{+{13}}$	0.999643 ± 0.000048	0.00012 ± 0.00002
Visit 34	$93_{- 28}^{+ 23}$ ${93}_{-{28}}^{+{23}}$	${0.999610}_{- 0.000049}^{+ 0.000050}$ ${0.999610}_{-{0.000049}}^{+{0.000050}}$	–
Visit 35	$64_{- 65}^{+ 38}$ ${64}_{-{65}}^{+{38}}$	${1.000089}_{- 0.000050}^{+ 0.000051}$ ${1.000089}_{-{0.000050}}^{+{0.000051}}$	${0.00117}_{- 0.00020}^{+ 0.00019}$ ${0.00117}_{-{0.00020}}^{+{0.00019}}$
Visit 36	$47_{- 57}^{+ 37}$ ${47}_{-{57}}^{+{37}}$	${0.999669}_{- 0.000048}^{+ 0.000049}$ ${0.999669}_{-{0.000048}}^{+{0.000049}}$	–
Visit 37	$103_{- 24}^{+ 20}$ ${103}_{-{24}}^{+{20}}$	0.999605 ± 0.000050	–

Notes. The background parameters a _bkg and b _bkg are the ones defined in Eq. 1. The roll-angle GP hyperparameters σ_GP and ρ_GP are the standard deviation of the process and the correlation scale in roll-angle unit (deg), respectively (see Section 4.1). The parameters σ _w, f₀ and c ₁ are the additive noise jitter term, the flux normalisation factor and the flux linear slope, respectively. σ_w is expressed in parts-per-million (ppm) and is added to all error bars quadratically. A negative value of σ _w means that the error bars are shrunk. Each f ₀ value is fitted after the corresponding data set has been normalised by its median value (i.e. all flux values are close to 1 and without units). The linear slope c ₁ is expressed in normalised flux units per day.

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