Ten TESS sectors from 2020 to 2024 do not show a steady width change of TrES-2 b under independent Gaussian sector errors

We test a steady change in the transit width of TrES-2 b in ten public TESS sectors from 2020 to 2024. Fixed coverage cuts retain 90 transits from original 120-second SPOC light curves. Each event has a free time, profile stretch, depth, and linear background. The model integrates the fixed exposure after the profile is stretched. The width is measured at half of the intrinsic central depth. It is not a contact duration. An unweighted line through ten sector means gives a slope of -0.127 minutes per year. Its two-sided 95% interval is [-0.419, +0.165] minutes per year, with eight residual degrees of freedom. This interval assumes independent Gaussian sector errors with equal, unknown variance. SAP flux, other backgrounds and profiles, a free geometric impact parameter, and a shared width per sector give intervals that include zero. Removing each sector in turn gives the same conclusion. The data do not establish an exactly constant width or a physical precession limit. Errors shared across sectors can change the result. The package preserves the ten original FITS files with source hashes and URLs. It also gives event and sector measurements, control tests, figures, source code, and reproduction steps.

TrES-2 b · TESS · transit width · transit duration · sector errors · signal recovery · reproducible astronomy