Periodogram of PTF r-band photometry of J1250, derived via the Lomb–Scargle algorithm. The power is an empirical overlap of the periodic signal with a sinusoid at the same frequency, where unity represents perfect overlap. The strong detection of a period at 0.342 days⁻¹ and higher harmonics is readily apparent. A second set of peaks at 0.056 days⁻¹ is the beat of this primary period with 1 day.