Simulation of the heat-pipe noise impact on ECLAIRs observations for different time scales in the 4–8 keV band (without correction for heat-pipe noise). From top to bottom: 10 ms, 20.48 s, and 1310.72 s observation simulations. The panels from left to right show the CXB plus TVAC count images, S/N sky maps, and histograms of S/N sky maps. The red line in the rightmost image is the trigger threshold, the trigger threshold of ECLAIRs equal to 6.5 σ_S/N (where σ_S/N is the standard deviation of each S/N histogram).