A rotation fit reduces the 5.49-day box score in KOI-2700 Kepler Q1 to Q17 from 17.5 to 5.2

We search Kepler release 25 light curves of KOI-2700 for an additional 0.12-day transit at periods of 2 to 20 days. The largest corrected-flux box score is 17.53 at 5.489946 days, half the published stellar rotation period. At this period, a 0.798-day box has a higher score of 37.80. A smooth fit at the published 10.98-day rotation period and its first harmonic reduces the narrow-box score to 5.23. Aperture flux gives the same direction of change. The linear fit retains 94 percent of an ideal narrow box contrast on the observed times. These tests support a broad rotation-related signal rather than a clear additional transit. They do not prove a starspot cause or exclude another planet. A wider mask selects a broad 2.182-day peak. A smooth rotation model on the observed times produces most of its mask-dependent contrast without another transit. We compare 20 shifted controls and 12 ideal transit injections. The products share exposures; there is no independent instrument confirmation. We do not repeat the full period search after the rotation fit. Code, source hashes, aggregate results, figures and retrieval steps are included. External light-curve records remain outside the signed package.

astronomy · KOI-2700 · KIC 8639908 · Kepler · transit search · stellar rotation · box least squares · null discovery result