Skip to main content

Come analyze HEASARC, IRSA, and MAST data in the cloud! The Fornax Initiative is now welcoming all interested beta users.

Xspec Home Page

next up previous contents
Next: constant: energy-independent factor Up: Multiplicative Model Components Previous: acisabs: Chandra ACIS q.e.   Contents


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$^{-2}$)