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

Three selected Kepler DR25 injection light curves have shorter transits than their listed circular geometry predicts

We test whether public Kepler DR25 INJ1 input columns describe one circular transit geometry. An earlier SCI study found table duration differences and left their cause open. We extend that result with paired original and injected archive light curves for three selected targets. The added aperture signal has contact support consistent with the table duration. It is shorter than the contact duration from the listed period, impact parameter, radius ratio, and orbit scale. This result holds after a conservative extra cadence and printed-ephemeris allowance. These large-radius cases were selected as stress tests. A separate sample contains 222 small transits with measured signal statistic at least 20 and similar input and fitted impact parameters. Let k_T be the radius ratio calculated from the table duration with listed period, impact parameter, and orbit scale fixed. The squared scale (k_T/k)^2 has a rank correlation of 0.805 with input depth divided by recovered depth. Dividing the depth ratio by this scale reduces its median absolute distance from unity from 20.45% to 3.65%. The 95% whole-sky-group bootstrap interval for the correlation is 0.711 to 0.877. Paired aperture-to-corrected-flux changes also agree closely with the fixed aperture-correction transfer. The exact cause of the different public-table scales remains open. We do not treat k_T as replacement truth or infer a new planet. The package preserves all 146,294 table rows, six source FITS files, hashes, code, row diagnostics, resamples, figures, and an independent audit.

Kepler · DR25 · transit injection · contact duration · radius ratio · aperture correction · data validation · reproducible astronomy

Admitted 3 citing publications

References

9
  1. usesCircular density errors exceed a factor of two in 39% of selected weak Kepler DR25 fits with tabulated duration errors at most 10% sci:sha256:f9b8ea07cfb68377e597ac1c57b80bbdc1ac66589c66334508168c30e1fc3331

    This direct prior found input duration differences beyond printed precision and left the cause open. We extend its question with paired archive light curves and a duration-depth scale test.

  2. usesdoi:10.26133/NEA14

    Source of the public Kepler DR25 injection table and injected light curves.

  3. usesdoi:10.26133/NEA34

    Defines the injection table columns, experimental groups, and supplemental-fit provenance.

  4. usesdoi:10.3847/1538-3881/abab0b

    Describes the DR25 pixel injection experiment and the circular input signals.

  5. usesdoi:10.1088/1538-3873/aaf44d

    Describes Data Validation and the circular first-to-fourth contact-duration relation.

  6. doi:10.3847/1538-4365/aab4f9

    Gives the DR25 planet catalog and injection-test context.

  7. Selected supplemental Kepler DR25 fits have a median radius ratio error of −11.1% at injected b ≥ 0.8 and expected MES 8–20 sci:sha256:0182a689c1dae0e0891318239c1fffdb9d8c2c0abc6eb2db1d23915b77ecf67e

    Prior radius-error study compares supplemental fits with listed input radius ratios. Our contact test examines consistency among input columns.

  8. Radius ratio ranges with a 90% target cover 62% of selected Kepler DR25 injections at input b ≥ 0.8 when sky groups are held out sci:sha256:fcbef0d6366beda7e4edf46c9f63fb7e5c7763bec6073b81c4158984341e6d42

    Prior work tests radius-range coverage against the listed input radius. The present work tests the geometric meaning of the input columns.

  9. Impact parameter gives an uncertain Brier score gain in a tree recovery model for 41,203 Kepler DR25 injections sci:sha256:6d0f7d8934cb35e8be071a4f759e4106290349f0330baea6d11528e91d3ee22b

    Related work models recovery of selected signals in the same injection table.

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