Fig. 4.
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Maps of X-ray emission from M 101. Left: soft-band (0.2−1 keV) overlaid on an Hα image. The contours are 3, 6, 12, 24, 48, and 96 × rms. The map is adaptively smoothed with the largest scale of 30″. Right: medium-band (1−2 keV) overlaid on a DSS blue image. The contours are 3, 6, 12, 24, 48, and 96 × rms. The map is adaptively smoothed with the largest scale of 30″, which is shown in the bottom corners of the maps.
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