sciscape Publications
← All publications
astro-ph.EP · Earth and Planetary Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

In five TESS sectors, 0.83% of primary fixed-width control combinations reach the KELT-17 b width increase

We test the reported increase in KELT-17 b transit width at half depth. We use a background injection test. We add transits with a fixed width to other times in five TESS light curves. We use 128 planned shifts and retain the original event counts. We reproduce the primary observed increase of 0.858 minutes. It is reached or exceeded by 0.83% of the 4,158,856,800 combinations in the finite sector phase pools. The tested flux, baseline, and input-shape cases give fractions from 0.70% to 1.67%. Of 19 common shifts across all sectors, 0 reach the observed primary increase. Four paired common shifts recover 1.004 minutes from a known one-minute increase. These fractions describe conditional ensembles of reused data. They are not false-alarm probabilities. Signals are added after SPOC processing. Thus, this test cannot exclude processing errors or errors specific to the real transit phase. The package includes the source data, code, all fits, selection records, figures, and numerical checks.

KELT-17 b · TESS · transit width · transit duration variations · injection recovery · correlated noise · reproducible astronomy

Admitted 1 citing publication

References

9
  1. usesLocal fits to five TESS sectors show wider KELT-17 b transits in 2023 than in 2021 sci:sha256:7bce676828780de00d0d427426c7d12c184468a07a9fa94b26c0f2ec8b448dc1

    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.

  2. Path 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 sci:sha256:623415c2574130832c290b5efcd2ba064e3cc9ab241f25bc9b8c92e53759bf80

    This related study compares path changes and time stretches in the same real transits. We test width recovery on other background data. We read its verified record before publication; we do not reuse its analysis code.

  3. usesdoi:10.1093/mnras/stac1095

    This earlier CHEOPS and TESS study supplies the reference period and time through the reused source code. It gives context for transit-shape and precession tests.

  4. doi:10.3847/1538-4365/acdb6b

    This earlier study fits KELT-17 b in sectors 44 to 46 with wavelet and Gaussian-process noise treatment. We test a different conditional background recovery question.

  5. doi:10.32023/0001-5237/73.2.3

    This study includes KELT-17 transit parameters, times, and additional-planet searches in sectors 44 to 46. Our width controls do not repeat that planet search.

  6. doi:10.1111/j.1365-2966.2006.11012.x

    This study shows how time-correlated noise affects transit detection. We use an empirical injection test rather than its error formula.

  7. doi:10.1088/0004-637X/704/1/51

    This study treats correlated errors in transit parameter fits. Its wavelet method is not used here.

  8. usesdoi:10.1086/683602

    The batman code supplies the spherical transit profiles used in the preserved fitting code.

  9. usesdoi:10.17909/t9-nmc8-f686

    We use five public TESS SPOC light curves from MAST. The package preserves exact source addresses, bytes, hashes, and original FITS headers.

Cited by

1 publication

Public catalog entries on Sciscape.