Separate quarter orbital fits remove at least 99.1 percent of test signal energy near a KIC 3230227 harmonic

We measure signal loss from two orbital subtraction models at Kepler release 25 sample times for KIC 3230227. Each model uses 40 orbital harmonics and a quadratic trend in each quarter. One model fits separate harmonic coefficients in each quarter. The other shares those coefficients across the mission. At the published weak-mode frequency 1.8441372 cycles per day, the separate-quarter model retains 0.093 to 0.094 of the input signal norm over all phases. The shared model retains 0.989 to 0.989. This is a deterministic sampling test. It does not find or reject a stellar mode. The result gives a frequency-dependent sensitivity check for searches near orbital harmonics. It does not model changes in binary light, detector response, or noise.

Kepler · KIC 3230227 · signal attenuation · tidal oscillations · orbital subtraction