Excess distribution (left) and distribution of uncertainties on the disk-to-star flux ratio (right). The blue histogram represents our H band follow-up observations of previous H band detections with PIONIER. The red line shows the distribution for our original survey (Ertel et al. 2014). Vertical dashed lines are plotted at fCSE/σf = −3 and fCSE/σf = + 3 for the excess distribution and at the median uncertainty (1.6 × 10-3) of our follow-up observations for the uncertainty distribution.
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