Impact of the Voronoi tessellation on the 2D temperature distribution. Top: temperature maps obtained for G041.45+29.10 by offsetting the center of the map wrt to the X-ray peak. The green circles identify R₅₀₀ centered on the peak. Bottom: ratio between the temperature recovered from the nine maps (using Eq. 2) and the temperature estimated using the spectra extracted from azimuthal annuli. Each color (from blue to red) represents one of the maps in the top panel (from top-left to bottom-right).