The two known mode pairs have unequal frequency offsets in high-order Kepler fits of KIC 3230227

We test whether two known mode pairs have the same offset from orbital harmonics in KIC 3230227. Their shared mode cancels from the difference. Fits with 200 orbital harmonics give a positive difference of 0.0000414 cycles per day in corrected flux and 0.0000316 in raw flux. The sign persists with 120 harmonics, in both time halves, and with season terms. Tests with added signals recover equal and unequal offsets. No equal-offset trial in 60 tests reaches the observed difference. These are conditional checks of known signals in one telescope. They do not give a calibrated discovery probability, a new mode, or a physical cause.

Kepler · KIC 3230227 · tidal oscillations · frequency detuning · phase difference · reproducibility