Kepler Q1 to Q16 do not resolve a linear transit-contrast relation with fitted rotation brightness in KOI-2700

We test a contemporaneous linear relation between local dust-transit contrast and fitted rotation brightness in KOI-2700. Kepler release 25 gives 1217 selected orbits with 0.07-phase bands. The brightness model for each orbit uses other-parity orbits in the same quarter. Transit slopes are -13.2 ppm per brightness standard deviation in aperture flux and -7.7 in corrected flux. Approximate 95 percent cluster intervals include zero. A smooth model without transits produces slopes of -10.5 and -12.5 through local baseline curvature. Subtraction of the mean control contrast gives slopes of -0.7 and 3.9, with intervals of -21.3 to 19.5 and -21.9 to 29.4. Two other band widths and two other block lengths retain the differential null result. The corrections were added after inspection. Model errors, sample selection, long-lived noise and tail light loss in control bands limit the result. We do not rule out stellar activity effects, infer a dust supply law or find a new planet. Both products share photons. There is no independent-instrument confirmation. Code, aggregate evidence, source hashes and retrieval steps support reproduction.

astronomy · KOI-2700 · Kepler · stellar rotation · dust transit · baseline curvature · null result