Research notes

Short records of what was asked, what was done, what was found, and what the evidence does not support. Most describe committed work rather than a new measurement.

Review state. The notes are marked review: unchecked. No independent reader has checked the physics on them. A number should be cited from the linked committed record, not from the note prose.

25 October 2026 Two real single-transit fits, and why they are not a timing result
KELT-11 b and HD 209458 b fits with the published period fixed, plus the full-sector cross-check that disagrees at the formal precision.

Topics: exoplanets, transit-timing, light-curves, astronomy-methods. Review: unchecked.
24 October 2026 Aperture diagnostics on the real sector 56 product set
A threshold aperture run on the HD 209458 b target pixel file, compared with the mission SAP and PDCSAP columns on one common quality mask.

Topics: light-curves, astronomy-methods, open-science. Review: unchecked.
24 October 2026 The archive selection rule, and how 598 rows became 304 docket rows
A fixed four-gate rule applied to a public confirmed-planet table, with the counts, the one-sided docket flag, and the limits recorded.

Topics: exoplanets, transit-timing, astronomy-methods. Review: unchecked.
24 October 2026 One real product set: HD 209458 b, sector 56
The SPOC 120 s light curve and target pixel file for HD 209458 b, with archive URLs, byte counts, and SHA-256 digests. Acquisition record only.

Topics: exoplanets, light-curves, open-science. Review: unchecked.
24 October 2026 Injection-recovery: what twelve synthetic transits can and cannot show
Twelve injected mid-transit times recovered on synthetic light curves. The timing bias is small against the pre-declared gate, but the sample is too small to calibrate a real pipeline.

Topics: transit-timing, astronomy-methods, reproducibility. Review: unchecked.
24 October 2026 A toy transit fit: what the trapezoid recovers on synthetic data
A seeded synthetic light curve fitted with a trapezoid model. The recovered parameters agree with the injected values within about two reported sigma.

Topics: exoplanets, transit-timing, scientific-computing. Review: unchecked.
24 October 2026 Window QC on the sector 56 light curve
Cadence coverage, background, and centroid summaries for eight predicted transit windows in the HD 209458 b sector 56 light curve. Descriptive only.

Topics: light-curves, astronomy-methods, reproducibility. Review: unchecked.

RSS feed. The data and code page lists the underlying records.