Spline fits give larger HAT-P-70 b half-depth widths in TESS Sector 98 than in Sector 32
We test whether the HAT-P-70 b transit profile differs between two public TESS data sets. Separate asymmetric spline fits give half-depth widths of 182.17 minutes in Sector 32 and 187.10 minutes in Sector 98. These sectors cover 2020 and 2025–2026. The later width is 4.93 minutes larger, or 2.71%. Resampling nine and twelve complete events gives a conditional 95% interval of 1.60 to 6.74 minutes for the difference. Event centers, depth scales, and local baselines are fitted with fixed time and depth references. The model includes exposure averaging. All listed processing alternatives give a positive width difference. The same signal is also added to both observed backgrounds. One of 128 trials gives a difference at least as large as the measured value. The trial windows can overlap, so this count is not a calibrated probability. A noiseless five-minute stretch is fitted as 5.86 minutes with the main grid. A finer grid gives 5.01 minutes. The interval does not include this representation error. The width is measured between half-depth crossings. It is not a contact duration. Errors shared by all events in a sector and changes in stellar surface brightness can affect this result. The study does not establish orbital precession. The package contains the raw archive files, hashes, selected samples, code, results, and figures.
HAT-P-70 b · TESS · transit photometry · half-depth width · gravity darkening · public data · reproducible research
References
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This study supplies the event locator and prior evidence for an asymmetric transit.
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This study supplies physical context for gravity darkening.
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This study includes earlier TESS transit fits for HAT-P-70 b.
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This study supplies context for local width fits and whole-event resampling. No source code was copied.
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This collection supplies the primary SPOC light curves.
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This collection supplies the QLP processing checks.
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This collection supplies the TESS-SPOC survey and cadence checks.
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This paper documents the QLP photometry change before Sector 98.
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesTwo TESS flux products give different fitted widths for one January 2026 HAT-P-70 b transit under a fixed profile
We use its raw FITS files, source ledger, and spline code. We add two visits and a controlled comparison of flux products.
- usesTwo stationary Gaussian noise models give larger fitted HAT-P-70 b half-depth widths in TESS Sector 98 than in Sector 32
We reuse its two raw FITS files, data selection, source ledger, and unchanged MIT spline code. We add a local covariance test of its width observation.
- usesTESS spline fits give a larger MASCARA-4 b transit width at half depth in 2025 than in 2021
This study supplies method context for asymmetric splines, exposure integration, whole-event resampling, and recovery checks. No source code was copied.
- supportsUnder one reference profile, fixed pixel sums give a larger HAT-P-70 b half-depth width in TESS Sector 98 than in Sector 32
The new pixel sums retain the positive width difference reported from public light curves. The observations are the same.