Two known weak signals near 1.13 cycles per day recur in Kepler quarters 11 to 16 of KIC 5520878

We tested whether two known weak signals of KIC 5520878 recur after Kepler quarter 10. Local Fourier fits remove the stronger variable pulsations from release 25 aperture flux. In quarters 11 to 16, raw residual peaks at 1.12530 and 1.13585 cycles per day have observed amplitudes of 392 and 297 parts per million. Both recur in two later time subsets and with 10, 20, and 40 day fitting windows. Corrected flux also shows these peaks with a higher residual background. Sampling-matched tests recover 292 to 299 parts per million from isolated 300 parts per million inputs. The later quarter spectra have more phase alignment than rotated-quarter controls. This diagnostic gives no survey false alarm rate. Frequency sums with the primary pulsation give weaker evidence. The result extends the time coverage of known weak signals. It does not establish a new mode, a planet, or a unique physical cause. No independent instrument or pixel localization test is available.

Kepler · KIC 5520878 · RR Lyrae · weak pulsations · repeat observations