Fig. 1

Two-Gaussian model parameters used in Eq. (2) to fit folded light curves of eclipsing binaries. The sets of model parameters are, from top to bottom panels: a) C = 7.5 mag, μ1 = 0, d1 = 0.5 mag, σ1 = 0.04, μ2 = 0.5, d2 = 0.35 mag, σ2 = 0.04, AAell = 0 mag; b) same as top panel, but with an ellipsoidal component centered on μ1 and with Aell = 0.05 mag; c) same as top panel, but with σ1=0.15 and σ2 = 0.15. The green dashed horizontal lines in each panel indicate the value of the constant C in the equation. The red continuous horizontal line segments in the top and middle panels give the widths of each of the two Gaussians at 2% of their depths. The black dotted lines in the middle and bottom panels give the individual components of the two-Gaussian models (only the m = 0 components of the Gaussians in Eq. (2) are shown). The black solid thin lines show the resulting two-Gaussian models.
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