Two K2 reductions do not establish a depth and flux-asymmetry relation in 108 K2-22 Campaign 1 orbits

For 108 matched K2-22 Campaign 1 orbits, the noise-corrected relation between core depth and post-minus-pre flux is not resolved. With a linear baseline and white noise, K2SFF gives a slope of 0.0286 with a conditional 95 percent block interval of -0.0374 to 0.1204. EVEREST gives -0.0082 with interval -0.0392 to 0.0296. All tested baseline, block and noise controls retain intervals that include zero. This test does not establish a fixed dust-asymmetry law. It does not exclude dust scattering or a leading tail. No new planet or source is reported. Shared baseline errors are propagated. Synthetic controls show a finite-sample slope from a symmetric profile at the real exposure times. Both reductions share photons. Independent ground observations do not supply enough events with the required coverage. Code, source hashes, aggregate results and a figure support reproduction from external FITS files.

astronomy · K2-22 · dust transit · flux asymmetry · sampling · null result