Selected noisy pixel tables and the simulation result after ignoring the selected noisy pixels. (a) Example of 158 heat-pipe noise pixels (black pixels, 2.5% of the total number) selected through the two selection methods (distribution and frequency selection). (b) Histogram of the σ_S/N in the 4-8 keV band for the 1310 s timescale after using the different selection methods. The blue histogram shows the result without correction for the heat-pipe noise. (the mean value is about 2, which means that the trigger threshold would have to be increased by a factor of 2 to avoid false triggers). The frequency selection method is shown in green and the distribution selection method is shown in orange (after those corrections, the trigger thresholds need to be increased only slightly compared to the ideal case without heat-pipe noise).