Local fits to five TESS sectors show wider KELT-17 b transits in 2023 than in 2021
We compare transit widths in seven public TESS sectors for KELT-17 b and KELT-19 A b. Time and quality rules select 33 KELT-17 transits and eight KELT-19 transits. Local fits measure the intrinsic full width at half depth. KELT-17 gives an increase of 0.858 minutes over 1.978 years. Its nominal 95% interval is 0.364 to 1.335 minutes when events are resampled within each sector. All eight fit choices give positive KELT-17 differences. The free curved trapezoid gives a linear slope interval that includes zero. KELT-19 gives a difference of 0.203 minutes over 5.951 years, with a nominal 95% event interval of -1.178 to 1.591 minutes. The event intervals assume independent errors within sectors and hold unknown sector offsets fixed. A shared epoch error could explain the KELT-17 difference. The data do not establish orbital precession or a new planet. The package preserves raw data, source hashes, event tables, code, figures, and reproduction steps.
KELT-17 b · KELT-19 A b · TESS · transit width · transit profile · orbital precession · public astronomical data
References
9- usesdoi:10.17909/t9-nmc8-f686
The study uses seven standard SPOC 120-second light curves from this TESS dataset. Exact file names and hashes are preserved.
- usesdoi:10.1086/683602
The batman code generates the fixed spherical reference profiles.
- usesdoi:10.1093/mnras/stac1095
Table 10 supplies reference times and periods for event prediction. The paper also supplies the earlier transit-shape comparison.
- doi:10.3847/0004-6256/152/5/136
- doi:10.3847/1538-3881/aa9e4d
- doi:10.32023/0001-5237/73.2.3
- doi:10.3847/1538-4365/acdb6b
- doi:10.1093/mnras/stad3915
- Five TESS sectors give no clear linear increase in KELT-21 b transit width from 2021 to 2024 sci:sha256:8b85b03aff29edc10535a5d546294ac8ee55c68c81e1f947b70d2ae3ddcc860f
This KELT-21 width study gives workflow context and explains the distinction between event scatter and sector errors. No code or source data were copied.
Cited by
5 publicationsPublic catalog entries on Sciscape.
- usesIn five TESS sectors, 0.83% of primary fixed-width control combinations reach the KELT-17 b width increase
We reuse its original TESS data, fitting code, and source records. We reproduce its three observed width differences. We add repeated transits at shifted train times on other observed background data.
- usesLocal fits to nine TESS sectors show no clear linear change in TOI-1431 b transit width from 2019 to 2024
This related transit width study supplies method ideas for local fits, shape controls, and the distinction between event noise and sector errors. No source code was copied.
- usesPath and time stretch models give similar fits to 33 KELT-17 b transits with a circular orbit, spherical star, fixed radius ratio, and free depths
We reuse its five original light curves, time and quality selection rules, and width candidate. New code tests two shape explanations. This is a follow-up on the same observations.
- usesThree spline node sets give KELT-19 A b width changes from -2.25 to +0.46 minutes in TESS sectors 7 and 87
We use attributed extracts to compare the earlier KELT-19 width result and event selection. The primary input files have identical hashes. The new shared spline and residual block analysis also gives no clear change. The overlapping data do not provide independent evidence. No prior code was copied.
- usesIn five TESS sectors, fixed 5 by 5 pixel sums show wider KELT-17 b transits in 2023 than in 2021 under a fixed profile
We reuse its reference profile, solver, frozen event set, source light curves, and result tables. We reproduce its corrected-flux widths and test new pixel sums.