Cross-correlation and DEM analysis results. Panel a: correlation coefficient (cc) between two parameters as a function of time lag. (panels b and c): DEM profiles in the flaring loop (panel b) and background corona (panel c) marked by the red boxes in Fig. 1. The black profile is the best-fitted DEM curve from AIA observations. The rectangles with different colors on the DEM plot encompass 95% (purple), 80% (turquoise), and 50% (yellow) of the Monte Carlo solutions, respectively. The mean temperature, EM, and observed time are labeled in each panel.