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Fig. 6

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HI4PI HI intensity image, integrated in the velocity range [5, 11] km s−1. The contours start at 320 K km s−1 and then increase in steps of 20 K km s−1. The red contours show the CO emission in the velocity range [5, 11] km s−1 (from Fig 3b), while the dashed yellow circle (radius of 045$\[0^{\circ}_\cdot45\]$) shows the putative outer shocks from SN 1054 at a velocity of 15,000 km s−1.

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