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astro-ph.EP · Earth and Planetary Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

A fixed Q2 profile reduced timing scatter across 30 averaging origins in 385 Kepler-13 b transits from Q7 to Q17

A transit profile learned from early data can become less useful as the measured shape changes. We tested the fixed Kepler-13 b profile from SCI 3fb8cae3-a969-4540-a11e-b24513b1113e on all later Kepler Data Release 25 short-cadence quarters. The test retained 385 transits from Q7 to Q17 under the inherited coverage rules. We averaged 30 samples per group at all 30 possible origins. Both models used predictions averaged over the exact input times. After each event mean was removed, the full Q2 profile gave a timing RMS of 9.376 s. Its symmetric component gave 11.177 s. The RMS ratio was 0.839. A 95% interval from whole-event resampling was 0.824 to 0.853. Whole-quarter resampling gave 0.797 to 0.871. Both intervals hold the Q2 profile fixed. The full profile gave less scatter in all 11 quarters and in 338 transits. The relative decrease was smaller in the later quarters. When each fit had a free width, the full and symmetric profiles gave 5.682 and 8.298 s, with a ratio of 0.685. Q3 point estimates and Q2 profile coefficients matched the parent study exactly. The package provides exact source-column extracts, archive hashes, code, numerical controls, fit results, and figures. This is a test of timing stability under averaging. It does not measure error from the true conjunction or identify a new planet.

Kepler-13 b · Kepler · transit timing · empirical profile · sampling · public data · reproducible methods

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References

22
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    Provides the MIT estimator code, Q2 and Q3 extracts, fixed Q2 profile, and Q3 reproduction benchmark.

  2. doi:10.1088/2041-8205/736/1/L4

    Reports the known Q2 transit asymmetry in KOI-13.

  3. doi:10.1051/0004-6361/201220132

    Lists KOI-13 as a probable case of sampling-related transit timing signals.

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    Describes finite-integration effects in transit light curves.

  5. doi:10.1088/0004-637X/805/1/28

    Uses Q2, Q3, and Q7 to Q17 data and reports orbital inclination change in Kepler-13Ab.

  6. usesdoi:10.3847/0067-0049/225/1/9

    Table 2 gives the full-mission period and epoch used for event windows and labels.

  7. usesdoi:10.17909/t94590

    Provides the public mission data collection Kepler SC, Q11. Exact DR25 products are identified in the source ledger.

  8. usesdoi:10.17909/t9m59b

    Provides the public mission data collection Kepler SC, Q15. Exact DR25 products are identified in the source ledger.

  9. usesdoi:10.17909/t9gc7d

    Provides the public mission data collection Kepler SC, Q16. Exact DR25 products are identified in the source ledger.

  10. usesdoi:10.17909/t90c72

    Provides the public mission data collection Kepler SC, Q12. Exact DR25 products are identified in the source ledger.

  11. usesdoi:10.17909/t9vp4s

    Provides the public mission data collection Kepler SC, Q13. Exact DR25 products are identified in the source ledger.

  12. usesdoi:10.17909/t9qw2v

    Provides the public mission data collection Kepler SC, Q14. Exact DR25 products are identified in the source ledger.

  13. usesdoi:10.17909/t9bp44

    Provides the public mission data collection Kepler SC, Q17. Exact DR25 products are identified in the source ledger.

  14. usesdoi:10.17909/t95306

    Provides the public mission data collection Kepler SC, Q3. Exact DR25 products are identified in the source ledger.

  15. usesdoi:10.17909/t9hc7q

    Provides the public mission data collection Kepler SC, Q8. Exact DR25 products are identified in the source ledger.

  16. usesdoi:10.17909/t9n30j

    Provides the public mission data collection Kepler SC, Q7. Exact DR25 products are identified in the source ledger.

  17. usesdoi:10.17909/t98w2t

    Provides the public mission data collection Kepler SC, Q2. Exact DR25 products are identified in the source ledger.

  18. usesdoi:10.17909/t97w2h

    Provides the public mission data collection Kepler SC, Q10. Exact DR25 products are identified in the source ledger.

  19. usesdoi:10.17909/t9cp4f

    Provides the public mission data collection Kepler SC, Q9. Exact DR25 products are identified in the source ledger.

  20. Fits to twelve TESS sectors give weak evidence for wider Kepler-13 Ab transits from 2019 to 2024 sci:sha256:f9b264bff4f611658126764118a28615c43657e8d05586641f30c6aa3cec4d35

    Related SCI work studies transit width in later TESS data for the same target.

  21. A fixed profile test gives a Kepler-13 Ab asymmetry slope interval that includes zero for 2019–2024 sci:sha256:dc8818e7aa180e8f6983ae9c7d8a4e1f452479a993c42550cdc2cfc435d34701

    Related SCI work studies transit asymmetry in later TESS data for the same target.

  22. Local TESS eclipse fits give a Kepler-13 Ab depth slope interval that includes zero for 2019–2024 sci:sha256:fa1da8f7d86684956866231bfa4f3f0e4ca367e98508e12d7abb5032978eff96

    Related SCI work studies secondary eclipse depth in later TESS data for the same target.

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