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Fig. 3

image

XX Tri light, color, and temperature curves. a) V data (dots) and their fits with a trend (dashed line), with co-added modulations of timescales of 6 yr and 12 yr (line). Dotted line shows the cyclic term from the fit of the VIC data. b) BV (upper dots) and UB (lower dots). The UB data were artificially shifted by +065 for easier presentation. c) VIC data (dots) and their fits with a trend (dashed line), and with co-added modulation on a timescale of 6.5 yr (line). The seasonal average comp-check values are plotted (shifted by +164 for presentation purpose) measured in the same time, and d) effective temperatures from VIC at maxima (triangles, overplotted with the 6.5 yr cycle originating from the VIC fit) and minima (squares) of the light curves. See text for details.

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