XMM-Newton and Chandra/ACIS images of PMN J1603–4904. The positions of the sources are indicated with arrows. Two unknown, weak X-ray sources are shown with orange circles. The 95% uncertainty on the Fermi-LAT positions from the 2FGL, 3FGL, and the 3FHL catalogs are representedwith gray, green, and yellow, respectively. Left: XMM-Newton/pn observation (ObsID 0724700101); middle: Chandra/ACIS observation (ObsID 17106); right: same Chandra/ACIS observation, the image was smoothed with a Gaussian kernel of S/N range of 3–5.
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