Fitting results of u_{x, n = 3} at ℓ = 492 (k_pix = 21) in the form of normalized histograms by the original code which fit the model to the square root of power (black), the modified original code which fit the power (blue), and the updated code (red). Horizontal lines indicate the average of 500 Monte–Carlo realizations given by the three codes (in the same colors as the histograms, dash-dotted black, dashed blue, and solid red). The short vertical lines on the horizontal lines indicates the error estimated by the codes (thin lines with short horizontal bars) and the standard deviations of the 500 fitting results (thick lines) in the same color as the histograms centered at the means (horizontal lines) by the three codes. We note that the fitting results with overly large deviation are omitted. See text for details.