Fig. 2
Sensitivity of Chandra and XMM towards the detection of X-ray emission on 32′′ scales. Contours show the levels of 1.2,2,3, and 5 × 10-16 ergs s-1 cm-2 and provide the intensity scale in the image. Left: all Chandra observations. The sensitivity does not reach the deepest contour. Middle: All XMM observations. Right: Chandra plus XMM.
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