... remnants

Appendix A is only available in electronic form at http://www.edpsciences.org

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... shock

Magnetic field values are found to be at least 30 times higher than the typical Galactic field of $3~{\mu}$G and imply that the field has been amplified, perhaps by the particle acceleration process (Bell & Lucek 2001).

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... shock

We do not consider CR production at the reverse shock since the magnetic field at the reverse shock may be considerably smaller than that at the forward shock due to the dilution by expansion and flux freezing of the progenitor magnetic field (see Ellison et al. 2005).

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... band

We did not calculate the synchrotron emission from the precursor.

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