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Fig. 2.
X-ray contours from an adaptively smoothed image (with a minimum significance of 3σ) superimposed onto the binned image ([0.5–2] keV energy band). Contours are in steps of 0.2 counts per 5.53″ pixel, starting from 0.3. The outer region denotes the locus where exposure time is 50% of the on-axis exposure time.
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