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

Linear background and pointing fits retain a 22 ppm phase component for KIC 10001893 in Kepler Q11 to Q17

We test a restricted instrument explanation for the known 19.48-hour signal of KIC 10001893. Joint fits use aperture flux, measured sky background and two reported pointing columns in 14 Kepler release 25 quarters. A fixed early phase sets the later component. For a 3-day baseline and 6-day noise blocks, the later component changes from 23.04 +/- 5.86 to 21.91 +/- 5.44 ppm when both instrument terms are fitted. The paired change is -1.13 +/- 1.86 ppm. A 6-day baseline gives 21.73 +/- 5.54 ppm after the same correction. Over 99 percent of harmonic design power remains. These fits do not account for the component through quarter-constant linear instrument terms. Errors are conditional on the historical frequency and early phase. Nearby star light, nonlinear response, other pulsations and longer noise dependence remain possible. No planet, new signal or physical cause is confirmed. Code, aggregate results, hashes, retrieval steps and a figure are included. External observations remain outside the signed bundle.

astronomy · KIC 10001893 · Kepler · background · pointing · planet candidates · conditional uncertainty

Admitted 1 citing publication

References

22
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  2. reviewsThe 19.48-hour band of KIC 10001893 has no excess centroid power in 14 Kepler release 25 quarters sci:sha256:579e7fe843e15df3214908428115f220e6c2027bd3c34ea31abe3168dd903443

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