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##

sresc: synchrotron spectrum, cut off by particle escape

The synchrotron spectrum from an electron distribution limited by
particle escape above some energy. The electrons are shock-accelerated
in a Sedov blast wave encountering a constant-density medium
containing a uniform magnetic field. The model includes variations in
electron acceleration efficiency with shock obliquity, and post-shock
radiative and adiabatic losses, as described in Reynolds, S.P., ApJ
493, 357 1998. This is a highly specific, detailed model for a fairly
narrow set of conditions. See also Reynolds, S.P., ApJL 459, L13
1996. Note that the radio spectral index and flux can be obtained from
Green's Catalogue at `http://www.mrao.cam.ac.uk/surveys/snrs` for
galactic SNRs.

par1 |
alpha: radio spectral index (flux proportional to frequency
f |

par2 |
break Hz: approximately the frequency at which the flux has
dropped by a factor of 6 below a straight power law extrapolation from
radio frequencies. This frequency is 5.3 times the peak frequency
radiated by electrons with energy in a magnetic field of
, in the notation of Reynolds (1998), Eq. (19). |

norm |
1 GHz flux (Jy) |

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