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Fig. 7

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Left: soft synchrotron component at 408 MHz from the Commander CMD2 analysis. The map is strikingly similar to the Haslam map (see Fig. 2), indicating that soft synchrotron emission has a very uniform spectrum from 408 MHz to 60 GHz through all data sets. Right: difference between the Haslam map and the Commander solution. This is consistent with noise across almost the entire sky with the exception of a few bright free-free clouds that are present in the Haslam data at the ~10% level. The lack of significant haze emission in the difference map (particularly in the south) is a strong indication that the haze region consists of both a hard and a soft component, and does not have a simple spatially variable spectral index.

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