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##

bknpower, zbknpower: broken power law

bknpower is a broken power law and zbknpower a
redshifted variant.

where:

par1 = |
power law photon index for |

par2 = |
break point for the energy in keV |

par3 = |
power law photon index for |

norm = K |
photons/keV/cm/s at 1 keV |

The formula and parameters for the redshifted variant are:

where:

par1 = |
power law photon index for |

par2 = |
break point for the energy in keV |

par3 = |
power law photon index for |

par4 = |
redshift |

norm = K |
photons/keV/cm/s 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 ergs/cm/s 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.

** Next:** bmc: Comptonization by relativistic
**Up:** Additive Model Components
** Previous:** bkn2pow: broken power law,