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Fig. 1

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Spectral index maps of the 29 known SNRs investigated in this work. They are obtained from the SMGPS and GLEAM data in the 0.155–1.284 GHz frequency range. The same color scale was used for comparison. The gray contours indicate the intensity levels related to the SMGPS maps convolved and regridded to the GLEAM beam and pixel size. They are the same as those reported in Figs. A1A.28.

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