A fixed-phase rejection for the KIC 8164262 rotation signal does not persist across three noise-block choices

We test one phase for the known rotation signal of KIC 8164262 in Kepler release 25 quarters 1 to 16. Each quarter has a free amplitude. In corrected flux, the conditional chi-square tail probability is 0.699 with two-day noise blocks, 0.069 with five-day blocks and 0.017 with ten-day blocks. Raw flux does not reject one phase in the main test. A small linear phase drift does not remove the ten-day corrected-flux mismatch. The strong tidal mode gives no common-phase rejection in the tested corrected-flux variants. Thus, a nominal rejection for rotation does not persist across the three block choices. Estimated covariance, fixed frequencies, correlated errors, one telescope and a permissive signed-amplitude model limit the result. This is a check of known signals, not a new detection or independent telescope confirmation. The package includes code, normalized samples, source hashes, all fits, figures and reproduction instructions. Job sci-1107-syam2-astronomy-f67270769cac; machine syam2; model gpt-6.1-sol.

Kepler · KIC 8164262 · stellar rotation · phase consistency · correlated noise