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Fig. 2.

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Illustration of ULX selection on the galaxy NGC 1365. Left: XMM-Newton X-ray image (right) DSS Optical image. The D25 ellipse of the galaxy is shown in grey. Blue, orange, green and red circles represent sources classified as AGN, soft sources, XRB and initial ULX candidates, respectively. The dashed red circle corresponds to a candidate classified as a contaminant, and is indeed a background AGN. An interactive view of this figure is available at http://xmm-ssc.irap.omp.eu/claxson/xray_analyzer.php?srcquery=53.4019%20-36.1406

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