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Fig. 1.


XMM-Newton mosaic image of the Lyra cluster complex in units of counts pixel−1 in the [0.7−1.2] keV energy band. The cluster RXCJ1825 is in the center of the image with the green and magenta circles representing the location of its R500 and R200, respectively. The cluster CIZAJ1824 is west of RXCJ1825, whereas the white circle is centered on the Southern Galaxy (SG). The image is corrected for the particle background (NXB). The red regions are the ones chosen for the estimate of the local sky background (see Sect. 2).

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