Fig. 3
Examples of simulated XMM-Newton pointings in the soft band. The large blue circle indicates the region in which the source detection is performed (13 arcmin maximal off-axis angle). Green boxes indicate the positions of sources detected with a likelihood ML > 15. Left: Texp = 10 ks, background ratio = 1; Middle: Texp = 10 ks, background ratio = 4; Right: Texp = 40 ks, background ratio = 1.
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