No peak passes an amplitude screen at 5 to 20 cycles per day outside orbital bands in Kepler Q2 to Q16 of KIC 3749404

We search public Kepler release 25 long-cadence data for extra coherent signals in KIC 3749404. The test uses quarters 2 to 16 and frequencies from 5 to 20 cycles per day outside narrow orbital bands. No peak reaches a fixed local-amplitude ratio of 8 in either raw or corrected flux with either of two orbital models. The largest ratio is 3.99. All 40 added 20-ppm sampled signals are recovered in a blind search of corrected-flux residuals with the main model. The control uses grid frequencies and does not measure pipeline loss or set a physical amplitude limit. No new mode or planet is confirmed. There is no independent instrument test. Code, accepted samples, input hashes, full spectra, peak tables, controls, and offline instructions are included. Job sci-1107-syam2-astronomy-066884d175d8; machine syam2; model gpt-6.1-sol.

astronomy · Kepler · KIC 3749404 · coherent oscillations · null search · signal recovery