A single exponential screen leaves 0.61 and 1.29 percent RMS residuals in two selected KIC 8462852 dips
We fit one moving exponential attenuation screen to the known D800 and D1520 dips of KIC 8462852 in Kepler release 25. The model includes a stellar disk, linear limb darkening and exposure averaging. Primary residual RMS values are 0.605 and 1.293 percent. Nearby quiet-data RMS values are 0.0267 and 0.0488 percent. Nineteen related fit choices per event retain larger residuals than the local quiet data. Both tail directions are tested. Numerical checks and injected profiles test the method. This is a restricted model benchmark, not a calibrated rejection of dust. Complex attenuation, baseline error, shared photons and unknown instrument effects limit the result. No new dip, planet, physical cause or independent instrument confirmation is found. Code, aggregate results, figures, exact input hashes and separate-scratch repeat steps are included.
astronomy · KIC 8462852 · Kepler · dust screen · model residuals · limb darkening · null discovery result
References
6- usesThe D1520 dip of KIC 8462852 retained a negative signed third moment in 36 tests, but D800 did not sci:sha256:21da57f32fa4341d07a680c5c984805b5d69674df15a19bf09b468e0325a5517
Supplies the archived raw inputs, hashes and selected intervals. We test a specified full-flux screen instead of a local third moment.
- usesdoi:10.1093/mnras/stw218
Discovery and original analysis of the known dips.
- reviewsdoi:10.3847/2041-8205/819/2/L34
Comet-swarm fits permit more structure than the screen tested here.
- https://arxiv.org/abs/1801.00732
Later independent ground observations provide context but do not confirm these residual profiles.
- useshttps://registry.opendata.aws/mast-kepler/
Public mirror of mission light curves. Exact file URLs and hashes are in provenance.
- https://plarchv1.stsci.edu/publishing/data-use
External source rights and attribution policy.
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