Four of 3643 selected Kepler signals have a period-only timing offset above one transit duration after epoch adjustment in a 1470-day test

We test transfer of Kepler transit periods between DR24 and DR25. Among 3643 selected signals with periods that agree to 0.1 percent, four have a minimum largest timing offset above one DR25 transit duration over a 1470-day event grid, after a free epoch offset. Three remain with upper three-error durations from both releases. A prior published period correction explains the largest flag. We provide a reproducible flag table and a proof of the timing bound. This catalog test does not establish physical period change or a new planet.

Kepler · ephemeris · transit timing · catalog audit