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X‐ray surface brightness fluctuations in the core (650 × 650 kpc) region of the Coma cluster observed with XMM–Newton and Chandra are analysed using a 2D power spectrum approach. The resulting 2D spectra are converted to 3D power spectra of gas density fluctuations. Our independent analyses of the XMM–Newton and Chandra observations are in excellent agreement and provide the most sensitive measurements...
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