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KMTNet View of Blue Large-amplitude Pulsators Toward the Galactic Bulge. I. Discovery of Wide-orbit Companions in OGLE-BLAP-006

  • Authors: Seung-Lee Kim, Chung-Uk Lee, Kyeongsoo Hong, Jae Woo Lee, Dong-Jin Kim, Sang-Mok Cha, Yongseok Lee, Dong-Joo Lee, Byeong-Gon Park

Seung-Lee Kim et al 2025 The Astronomical Journal 169 .

  • Provider: AAS Journals

Caption: Figure 2.

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.

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