pexrav: reflected powerlaw, neutral medium
Exponentially cut off power law spectrum reflected from neutral
material (Magdziarz & Zdziarski 1995). The output
spectrum is the sum of the cutoff power law and the reflection
component. The reflection component alone can be obtained for
. Then the actual reflection normalization is
. Note that you need to then change the limits of
to exclude zero (as then the direct component
appears). If = 0 there is no cutoff in the power law. The metal
and iron abundance are variable with respect to those defined by the
command abund. The opacities are those set by the command
xsect. As expected in AGNs, H and He are assumed to be fully
ionized
The core of this model is a Greens' function integration with one
numerical integral performed for each model energy. The numerical
integration is done using an adaptive method which continues until a
given estimated fractional precision is reached. The precision can be
changed by setting PEXRAV_PRECISION eg xset PEXRAV_PRECISION
0.05. The default precision is 0.01 (ie 1%).
par1 
, first power law photon index,

par2 
, cutoff energy (keV) (if = 0 there is no cutoff) 
par3 
, reflection scaling factor (0 = no reflected
component, <0 reflection component only) 
par4 
redshift, z 
par5 
abundance of elements heavier than He relative to the solar
abundances 
par6 
iron abundance relative to that defined by abund 
par7 
cosine of inclination angle 
norm 
photon flux at 1 keV (photons/keV/cm/s) of the cutoff
broken powerlaw only (no reflection) in the observed frame. 
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Last modified: Tuesday, 28May2024 10:09:22 EDT
