Probability distribution of the unabsorbed/absorbed flux ratio in the 2–10 keV, as a function of the measured 0.5–2/2–10 keV flux ratio, for the Burlon sample, at redshift zero. The x-axis shows Log(SH), therefore hard sources are on the left and soft sources are on the right. The y-axis shows Log(U), therefore no correction is at the bottom and large corrections are at the top. The colour scale goes from white (low probability) to black (high probability).