The C statistic is a useful tool in astronomy for analyzing low-count Poisson data without combining data points. This study looked at the distribution of the C statistic for a specific model and found that in high-count situations, it behaves like a χ2 statistic. However, in low-count scenarios, the C statistic can give lower results than expected. The researchers used X-ray data from an astronomical source to demonstrate how the C statistic can be applied to Poisson data.