An assessment of the contamination within the samples of possible members. This is calculated by sampling 100 values from the posterior distributions of our mixture model parameters and checking how many times each star survives our cut using the model parameters from each of the 100 samples. The potential members (in yellow) survived 100% of the time, while those closer to blue survived the corresponding fraction of times. Contaminants identified through their position in the CMD are indicated using the square markers.