Fig. A.3.
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EPIC-pn (left) and MOS2 (right) 0.3–10 keV images of the field around NGC 4656 ULX-1. The source extraction regions (solid circles, 20″) are centered on the ULX position, while the dashed circles mark the background regions (40″), chosen on the same CCD and free of contaminating sources. The colorbar scale indicates surface brightness in units of counts per pixel.
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