TESS flux and baseline choices change fitted dip widths near Kepler-108 b transit times in sectors 74 and 81
We test how flux and baseline choices affect dip fits near two Kepler-108 b search times in public TESS data. A positive-depth, exposure-integrated trapezoid grid uses the same three-day windows and tests linear and quadratic baselines. For the sector 81 event and its sector 82 baseline, corrected SPOC flux gives a best full width at half maximum of 21.0 hours. Raw aperture flux gives 9.6 hours. The fitted centres differ by 4.8 hours. Both baseline orders give this result. In sector 74, the baseline order changes the best width from 7.2 to 11.4 hours. A further 228 fixed-template fits show time shifts with shape and aperture choices. Close-star TIC products share the observations; some have identical aperture flux. Time-shifted control windows include a larger fixed-template fit gain than either target window. These conditional results do not establish a physical duration change or a new planet. The package preserves 13 original FITS inputs, exact archive identifiers and hashes, the selection rule, all fit outputs and status flags, code, figures, and numerical checks. It provides a repeatable test case for transit inference in blended TESS data.
Kepler-108 · TESS · transit duration · transit timing · flux correction · blended stars · reproducible analysis
References
4- usesdoi:10.3847/1538-3881/153/1/45
The study supplies the orbit and host context. The search clock uses Table 2, solution P1, of arXiv version 1, as stated in the text.
- doi:10.1093/mnras/staf334
This prior work uses TESS to extend Kepler and K2 transit records. We make no first-observation claim.
- usesdoi:10.17909/t9-r086-e880
Six QLP light curves supply the earlier-event and aperture checks.
- The fitted time of the second 2020 HD 110067 c transit depends on the TESS flux and duration models sci:sha256:bd9690aad1d801eba0c0e8db54ad2c240c7022406c5824c295a51c904ee0eb93
A related study tests how flux and duration choices affect another TESS transit time. The present work uses new code and a different target.
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