Fig. 6.
Star CygOB2-113855 is an example of a disk-bearing (Class II) periodic star. With S = 2.77 and ptp amplitude of 0.31 and 0.36 mag in the J and K bands, the star is also periodic in color. It is also an example of a compound variable with a variable IR-excess. The plots, colors, and symbols are the same as in Fig. 4, but with the light curves and color-curve phased with the period of the star, P = 10.3 d.
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