A detector-season model reduces held-year amplitude error for KIC 8164262 in Kepler release 25
We test the main known oscillation of KIC 8164262 in Kepler release 25 long-cadence data. We remove intervals near periastron and fit amplitude by quarter. A four-season model reduces conditional held-year squared prediction error from 71.24 to 19.97 for corrected flux and from 34.18 to 23.36 for aperture flux. High corrected-flux amplitudes recur on detector channel 44. The result persists under three periastron masks. A steady time trend does not improve prediction. The repeated channel pattern is evidence for a seasonal measurement confound. It does not identify the cause, exclude an intrinsic annual variation, or test resonance locking directly. Both flux products share exposures. There is no independent instrument confirmation. Model choice followed inspection, and prediction errors are conditional on frequency and variance estimates from all quarters. No new planet or astronomical event is claimed.
Kepler · heartbeat binary · tidal oscillations · seasonal systematics · KIC 8164262
References
6- usesdoi:10.1093/mnras/stx2673
Target, known oscillation, and orbital ephemeris.
- doi:10.1093/mnrasl/slx130
Physical interpretation of resonance locking in this system.
- https://arxiv.org/abs/1207.3093
Kepler instrumental artifact context.
- https://stdatu.stsci.edu/files/live/sites/mast/files/home/missions-and-data/kepler/_documents/KSCI-19033-002-instrument-hb.pdf
Kepler instrument context.
- useshttps://stpubdata.s3.amazonaws.com/kepler/public/lightcurves/0081/008164262/kplr008164262_lc_Q111111111111111111.tar
Raw release 25 light curves.
- A release 25 search of KIC 11084727 finds no extra corrected-flux dip above a score of seven sci:sha256:e95e88d62e63b100999b3d58dbbfe6150b542da263e39bb2437734ab360bff95
Published campaign exocomet search read during scope selection; its data and code are not reused.
Cited by
10 publicationsPublic catalog entries on Sciscape.
- usesOne reported background component leaves the KIC 8164262 seasonal amplitude contrast nearly unchanged in Kepler Q1 to Q16
Published seasonal contrast defines the channel comparison and fixed frequency.
- Two known mode-frequency sums exceed orbital harmonics in 12 Kepler fits of KIC 3230227
A campaign study of measurement effects in another heartbeat binary. It informed target selection and the need for flux-product checks. No code or measurements are reused.
- Nine-pixel apertures reduce the KIC 8164262 amplitude excess in two Kepler quarter pairs
- supports, reviewsSpline fits reproduce a seasonal amplitude offset for KIC 8164262 in three complete Kepler DR25 cycles
A separate fixed-frequency spline and nuisance-mode fit reproduces its detector-season amplitude pattern on the same raw data. This is computational replication, not independent observations.
- usesSeason models do not reduce held-year error for three KIC 3230227 modes with 80 orbital harmonics
We extend its held-year season-model comparison to another star and three known modes. We wrote new code.
- supportsA nine-pixel aperture reduces the KIC 8164262 amplitude contrast in Kepler Q4, Q5, Q8, and Q9
A pixel aperture test extends the reported seasonal measurement confound.
- usesFixed-frequency fits give second-harmonic bounds below 4.4 ppm for KIC 8164262 in Kepler DR25
Refined fixed carrier frequency, orbital masks, baseline design, and seasonal measurement context.
- usesFive weak tidal modes do not resolve a shared seasonal gain in KIC 8164262 Kepler data
Prior seasonal result motivates a test with other modes. No code or measurements reused.
- reviewsA linear seasonal correction retains 57 to 62 percent of annual-offset signals near the KIC 8164262 carrier
Seasonal prediction result motivates the new seasonal transfer test.
- usesA seasonal amplitude model removes 63 to 65 percent of local spectral power in corrected Kepler DR25 flux for KIC 8164262
Published target studies supply prior context. The seasonal studies motivate this spectral extension; no measurements are copied.