Lomb-Scargle (LS) periodograms for each permutation of binary component and photometric technique, after isolating signal for each binary component by running LCF. Panel A: Periodogram of all epochs of the I-band GUFI photometric data of 2M J1314+13A, after subtraction of the putative rotational period of the secondary component. We discovered optical variability of 2.06 ± 0.05 hours detected as the highest peak in the periodogram. Panel B: Periodogram of all epochs of the I-band GUFI photometric data of 2M J1314+13B, after subtracting out the primary period. We indicated a periodicity of 3.79 ± 0.05 hours detected as the highest peak in the periodogram. The vertical red dashed line (shown in close-up in the inset plot) corresponds to the detected optical periods using each technique for each component. The dashed-dotted line on each plot corresponds to the 5σ false-alarm probability in each case.