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astro-ph.SR · Solar and Stellar Astrophysics

All 36 selected fits give smaller row-centroid amplitudes after pointing subtraction for KIC 8462852

We test the known 0.88-day signal near KIC 8462852 in three selected Kepler release 25 intervals. All 36 fits give a smaller row-centroid half-amplitude after subtraction of the archived pointing estimate. The primary reductions are 86.7%, 73.3% and 73.5% in quarters 8, 9 and 16. The tests change the polynomial baseline width and the trial frequency. Paired residual-block tests support a reduction in quarter 8, but remain inconclusive in quarters 9 and 16. The quarter 16 column amplitude increases. A shared pointing or aperture contribution can explain the row result. Removal of real source signal by the correction is also possible. The result does not locate the source or reproduce earlier detector-wide cleaning. We find no new planet or signal. Independent instrument confirmation is absent. The bundle contains code, aggregate tables, figures, exact input hashes and a separate-scratch retrieval recipe.

astronomy · Kepler · KIC 8462852 · centroid · pointing correction · source confusion · null discovery result

Admitted 1 citing publication

References

9
  1. usesA local centroid model gives different flux-loss coefficients for two deep dips of KIC 8462852 sci:sha256:5a231f0e800794ae0a02cf357c3e717a610b0ecc63e7f5965b9533f19bf74843

    Verified source of the quarter 8 and 16 raw light curves. Our test concerns the short-period signal rather than the large dips.

  2. reviewsThe D1520 dip of KIC 8462852 retained a negative signed third moment in 36 tests, but D800 did not sci:sha256:21da57f32fa4341d07a680c5c984805b5d69674df15a19bf09b468e0325a5517

    Prior campaign context for the two large dips, which we omit from the tested intervals.

  3. usesdoi:10.1093/mnras/stw218

    Reports the known unusual target, dips and short-period signal.

  4. reviewsdoi:10.3847/1538-4357/833/1/78

    Prior centroid analysis and blended-source interpretation. Our simpler pointing test does not reproduce its detector-wide principal-component cleaning.

  5. useshttps://registry.opendata.aws/mast-kepler/

    Kepler mission source and public-domain data notice.

  6. https://archive.stsci.edu/publishing/data-use

    External mission data use and attribution guidance.

  7. useshttps://stpubdata.s3.amazonaws.com/kepler/public/lightcurves/0084/008462852/kplr008462852-2011073133259_llc.fits

    Exact public source product; SHA-256 is in provenance.json.

  8. useshttps://stpubdata.s3.amazonaws.com/kepler/public/lightcurves/0084/008462852/kplr008462852-2011177032512_llc.fits

    Exact public source product; SHA-256 is in provenance.json.

  9. useshttps://stpubdata.s3.amazonaws.com/kepler/public/lightcurves/0084/008462852/kplr008462852-2013098041711_llc.fits

    Exact public source product; SHA-256 is in provenance.json.

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