Thresholded expected point source count rate analysis for TM1. Left panel: Expected count-rate (λ_t) from point source emission below the detection threshold (Eq. (C.3)), illustrating that it is everywhere below unity, indicating negligible discarded flux. Right panel: Ratio between the thresholded expected point source count rate (λ_t) and the expected noise ($(\sqrt{\lambda })$). The flux discarded by thresholding is consistently below half of the noise level, confirming its low significance.