A broken power law.
|
E £ Ebreak |
E ³ Ebreak |
where:
par1 = |
power law photon index for E < Ebreak |
par2=Ebreak |
break point for the energy in keV |
par3= |
power law photon index for E > Ebreak |
norm=K |
photons keV-1cm-2s-1 at 1 keV} |