Observed properties of the 2D temperature distribution. Left: Measured values (blue circles) of the skewness in the temperature distribution of T_2D, i/T_2D, j (being T_2D, j the temperature of the annulus encompassing the cell i) compared with a typical uncertainty (green squares) that can be associated with the number of cells on the temperature map. Middle: QQ plot, assuming a normal distribution, of the T_2D, i/T_1D, j values for the maps with S/N = 30. Right: QQ plot assuming a log-normal distribution. In the inset plots, we show the results when using the maps with S/N = 50. The units of the QQ plots are given in z-score (i.e., subtracting the mean from each data point and dividing it by the standard deviation).