Fig. 1
The ratio of the χ2 of the composite best fit of the entire time series (from HJD 2454572.5075 to 2454717.4519) to its minimum value vs. the parameter Q, i.e., the ratio of the facular area to the cool spot area in active regions. The horizontal dashed line indicates the 95 percent confidence level for 
, determining the interval of acceptable Q values.
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