Left panel: wavelet-reconstructed Chandra X-ray image in the 0.5–2.5 keV energy band. The dashed circles correspond to 1 Mpc for M 0520 and 0.5 Mpc for 1WGA 0521, which have been used to extract the spectra. Right panel: X-ray spectra of the two extended sources (top: M 0520, bottom: 1WGA 0521), extracted from the event list in the 0.5–10 keV band.
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