TESS data with 120-second exposures show a wider TOI-1518 b transit at half depth in late 2024 than in 2022
We compare the transit width at half depth of TOI-1518 b in 2022 and late 2024. We use 60 accepted transits from five public TESS light curves with 120-second exposures. A shared circular transit model gives an increase of 8.25 minutes. We resample complete transits within each sector. The conditional 95% interval is 7.94 to 8.58 minutes. Separate symmetric spline profiles give an increase of 8.77 minutes, with an interval of 8.02 to 9.48 minutes. The tested flux products, local baselines, timing choices, and spline shapes give positive changes. Constant-shape trials at the real sample times do not give a similar change. Sectors 84 and 85 extend the data used in the cited prior studies. The result supports continuation of the known transit-shape change. It does not establish its cause. The intervals do not include errors shared by a sector or errors from model choice. The package includes original FITS files, source hashes, code, event decisions, resamples, controls, tables, and figures.
TOI-1518 b · TESS · transit width · nodal precession · public data · reproducible analysis
References
8- usesdoi:10.1093/pasj/psae019
This work supplies the prior transit-shape result and the fixed limb coefficients. The late-2024 measurements test continuation of that behavior.
- usesdoi:10.1051/0004-6361/202453241
This work supplies the adopted timing locator. Its Appendix A uses sectors through 77 and gives a time-averaged geometry.
- doi:10.1093/mnras/staf1648
- usesdoi:10.1086/683602
The batman implementation evaluates the transit model.
- usesdoi:10.17909/T9-NMC8-F686
Public TESS 120-second SPOC light curves are the primary input data.
- usesdoi:10.17909/t9-wpz1-8s54
The 2019 TESS-SPOC light curves provide a historical sensitivity check.
- usesdoi:10.17909/t9-r086-e880
QLP light curves provide a comparison of pipeline products from the same mission.
- usesTESS spline fits give a larger MASCARA-4 b transit width at half depth in 2025 than in 2021 sci:sha256:4f3786e792d260dd51aebe486083b9db226c8651fdd585c2dcfd5733919f4e4f
This study provides method context for empirical TESS width comparisons, event resampling, and spline-spacing controls. No code or target data were copied.
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesA circular model with a fixed stellar spin gives a conditional quadrupole lower limit from 2022–2024 TOI-1518 b transit fits
This signed source supplies the public TESS files, selected flux samples, event decisions, joint geometry resamples, and transit model controls. We retain the complete source publication without changes.