Figure 1. Post-outburst XMM-Newton EPIC-PN observation of Swift J1834.9−0846 in 2011 (obs. 2, upper and middle panels) and pre-outburst 2005 EPIC MOS1+MOS2 observation (obs. 1, bottom panel). The middle and bottom images are Gaussian smoothed with an FWHM of 5.0 pixels (20′′). The smallest green circle with a 25′′ radius represents the Swift J1834.9−0846 point-source emission. The annulus with 25′′ r 50′′ represents the symmetrical extended emission around the point source (region A). The ellipse of major (minor) axis of 145′′ (95′′) encloses the asymmetrical extended emission around Swift J1834.9−0846 (region B). Other sources in the field are labeled. North is up and west is right.
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