A power law with high energy exponential rolloff.
|
par1 = a |
power law photon index |
|
par2 = b |
e-folding energy of exponential rolloff (in keV) |
|
norm = K |
Photons keV-1cm-2s-1 at 1 keV |
If POW_EMIN and POW_EMAX have been defined by the xset command then the norm becomes the flux in units of 10-12 ergs cm-2 s-1 over the energy range (POW_EMIN, POW_EMAX) keV unless POW_EMIN = POW_EMAX in which case the norm becomes the flux density in micro-Jansky at POW_EMIN keV. In these cases it is important that POW_EMIN and POW_EMAX lie within the energy range on which the model is being evaluated.