Fig. 17

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Distribution of periods vs. R − I color. Class flat sources are indicated in black, Class II sources in red, and Class III sources in blue. The CTTS and WTTS are marked with red and blue crosses, respectively. The red dashed-dotted line represents the median of the period within a 0.1 bin size in the color R − I, taking into account periods over 2 days (horizontal black dotted line).
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