Fig. 4.
Fractional amplitude of projected (2D) X-ray surface brightness fluctuations A2D = (P2D2πk2)1/2 for RXCJ1825 (blue) and CIZAJ1824 (red) as a function of wave number k. The power spectra P2D were extracted within a circle of 200 kpc radius around the X-ray peak of both structures. The shaded areas show the 1σ confidence intervals for both regions.
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