Fig. B.2
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Residual background constant and the background uncertainties of the surface flux profiles. The black dots in the upper panels are the surface flux profiles of NGC 1275. The coloured lines are four randomly selected background surface flux profiles in Abell 2764, except for the bottom left panel, where we show profiles measured on the WISE 12 µm map for Perseus. Shades in the lower panels mark the 16th and 84th percentiles. One count in IE (YE, JE, HE) corresponds to 27.4 (25.1) mag arcsec−2.
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