A fixed 62-star control mask does not flag two Kepler flare groups in quarters 13 and 17

We tested whether stars outside a public flare catalog can flag two shared Kepler event times. A prior SCI study supplied the groups and exposure numbers. We selected 64 confirmed planet host stars by a fixed hash rank. Every selected star was absent from the flare catalog. Both quarter files were available for 62 stars. We tested a local pulse contrast in simple aperture flux and conditioned aperture flux. A fixed mask requires a median standardized contrast of at least 3 in both products. It selects no centers in either quarter 13 or quarter 17. At the two tested starts, the conditioned-flux median contrasts are 0.00112% and 0.00206%. Their time ranks are ordinary. The quarter 13 aperture-flux contrast is unusual, but the quarter 17 rank depends on the pulse window. We also test six event images with a scaled normal image. All six have larger residuals than every local reference fit. Five keep this result within the optimal target aperture. KIC 9365427 does not. These image tests are exploratory and do not locate the source or give false-flare probabilities. The results show a limit of the tested control mask and support further source checks. The package preserves 124 full light-curve column sets, six pixel segments, source hashes, code, results, figures, and offline reproduction instructions.

Kepler · stellar flares · catalog validation · target pixel data · control stars · instrument effects · reproducible research