Fig. 2
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Ratio map (see Eq. (3)) of the red and blueshifted GMCA images. For example, a pixel with a value of 1 is dominated by the blueshifted GMCA image. The main synchrotron filaments are indicated in green, found with a contour detector in the first GMCA component. The dark contours come from the total image of the SNR in the 1.6–2.1 keV band smoothed by a 5 arcsec Gaussian kernel.
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