## 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 .