Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets

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Volume 640 (August 2020)

A&A, 640 (2020) A32

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Table 3

Photometric observations, measured jitters, and TTVs of WASP-148b transits.

Instrument	Band	Date	Relative num-	Transit epoch T₀	TTV	TTV	Photometric jitter
(cf. Fig. 5)			ber of transit	[BJD_UTC − 2 450 000]	[min]	significance	[relative flux]
SuperWASP	–	2008 Jun 20	−377	4638.453 ± 0.026	+ 3 ± 38	0.1 σ	(3.3 ± 2.5) × 10⁻³
SuperWASP	–	2010 Jun 4	−296	5351.525 ± 0.017	− 51 ± 25	2.0 σ	(1.6 ± 1.3) × 10⁻³
SuperWASP	–	2011 May 31	−255	5712.5185 ± 0.0061	+ 3.5 ± 8.6	0.4 σ	(4.7 ± 1.8) × 10⁻³
Nites	–	2014 Aug 13	−122	6883.4435 ± 0.0014	+ 30 ± 1.9	15.9 σ	(2.6 ± 2.0) × 10⁻⁴
Sánchez	Johnson-R	2015 Jun 18	−87	7191.55670 ± 0.00082	+ 0.5 ± 1.0	0.5 σ	(3.9 ± 3.0) × 10⁻⁴
Nites	Johnson-R	2016 Jun 13	−46	7552.5045 ± 0.0012	− 11.4 ± 1.5	7.4 σ	(3.34 ± 0.14) × 10⁻³
Mars	–	2017 Apr 17	−11	7860.6467 ± 0.0013	+ 1.8 ± 2.2	0.8 σ	(9.7 ± 1.4) × 10⁻⁴
Rise	og515+kg5	2017 Jul 22	0	7957.48077 ± 0.00030	− 10.01 ± 0.41	24.7 σ	(7.0 ± 5.4) × 10⁻⁵

Notes. The four last columns summarize the statistics for the marginal posteriors (Sect. 5.1). In particular, the reported TTVs are obtained using the mean ephemeris derived in Sect. 5.4.1, and the reported error on the TTV amplitude for each transit corresponding to the error on T₀.

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