Distinguishing between light curves of ellipsoidal variables with massive dark companions, contact binaries, and semidetached binaries using principal component analysis

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Fig. 2.

Mean normalized light curves of dark companion, semidetached, and contact binary systems, obtained by taking the average of all normalized light curves of a given class at each phase point of the grid. The mean light curves are subtracted from the light curves of the corresponding class before performing PCA.

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