cabs: Optically-thin Compton scattering.

Optically-thin Compton scattering.

$\displaystyle M(E)=exp(-\eta_H\sigma_T(E))
$
where $\sigma_T(E)$ is the Thomson cross-section with Klein-Nishina corrections at high energies. Note that this model does not do frequency downshifting so is only valid for scattering out of the beam.

par1=$\eta_H$ hydrogen column (in units of $10^{22}$ atoms cm$^{-2}$)



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