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##

gauss, zgauss: gaussian line profile

A simple gaussian line profile. If the width is then it is treated as a
delta function. The zgauss variant computes a redshifted gaussian.

where:

par1 |
, line energy in keV |

par2 |
, line width in keV |

Norm |
, total photons/cm/s in the line |

For zgauss the corresponding formula is:

and parameter settings are:

par1 |
, source frame line energy in keV |

par2 |
, source frame line width in keV |

par3 |
, redshift |

Norm |
, source frame total photons/cm/s in the line |

The line is truncated at the point that the integrated flux under the line is
within a critical value of the total flux. This critical value can be
changed using xset LINECRITLEVEL. The default critical value is
.

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