Last modified: December 2020

URL: https://cxc.cfa.harvard.edu/sherpa/ahelp/xsreflect.html
AHELP for CIAO 4.13 Sherpa v1

xsreflect

Context: models

Synopsis

The XSPEC reflect convolution model: reflection from neutral material

Syntax

xsreflect

The xsreflect model is a convolution model component.

Description

The model is described at [1] .


Example

>>> create_model_component("xsreflect", "mdl")
>>> print(mdl)

Create a component of the xsreflect model and display its default parameters. The output is:

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.rel_refl thawed            0           -1        1e+06           
   mdl.Redshift frozen            0       -0.999           10           
   mdl.abund    frozen            1            0        1e+06           
   mdl.Fe_abund frozen            1            0        1e+06           
   mdl.cosIncl  frozen         0.45         0.05         0.95           

ATTRIBUTES

The attributes for this object are:

Attribute Definition
rel_refl The reflection scaling parameter (a value between 0 and 1 for an isotropic source above the disk, less than 0 for no reflected component).
Redshift The redshift of the source.
abund The abundance of the elements heavier than He relative to their solar abundance, as set by the set_xsabund function.
Fe_abund The iron abundance relative to the solar abundance, as set by the set_xsabund function.
cosIncl The cosine of the inclination angle in degrees.

Notes

Unlike XSPEC, the convolution model is applied directly to the model, or models, rather than using the multiplication symbol.

The precision of the numerical integration can be changed by using the set_xsxset function to set the value of the REFLECT_PRECISION keyword, which defines the fractional precision. The default is 0.01 (1%).

References

Changes in CIAO

Added in CIAO 4.13

XSPEC version

CIAO 4.13 comes with support for version 12.10.1s of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.1s

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.

See Also

models
xsbexrav, xspexrav