Fourier amplitude spectra of OGLE-BLAP-006 after correcting for timing variations. (Left) Upper panel displays the KMTNet I-band spectrum, showing higher amplitudes than those obtained before the timing correction in Figure 1. The prewhitening process in the lower panel reveals four new frequencies, f₂ to f₅. Frequencies with amplitudes above the horizontal blue dashed line of S/N = 4.0 are 1.0 day⁻¹ aliasing sidelobes and close frequencies. (Right) Upper and lower panels show prewhitening results for the KMTNet V and OGLE I bands, respectively. The vertical red lines indicate frequencies f₂ to f₅ identified in the KMTNet I-band data. The OGLE spectrum exhibits 1.0 day⁻¹ aliasing sidelobes with significantly higher amplitudes than those in the KMTNet.