Last modified: December 2020

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

xsireflect

Context: models

Synopsis

The XSPEC ireflect convolution model: reflection from ionized material

Syntax

xsireflect

The xsireflect model is a convolution model component.

Description

The model is described at [1] .


Example

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

Create a component of the xsireflect 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           
   mdl.T_disk   frozen        30000        10000        1e+06          K
   mdl.xi       frozen            1            0         1000   erg cm/s

ATTRIBUTES

The attributes for this object are:

Attribute Definition
rel_refl The reflection scaling factor (1 for isotropic source above disk).
Redshift The redshift of the source.
abund The abundance of elements heavier than He relative to their solar abundances.
Fe_abund The iron abundance relative to the above.
cosIncl The cosine of the inclination angle.
T_disk The disk temperature in K.
xi The disk ionization parameter: see [1] for an explanation.

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 IREFLECT_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
xsbexriv, xspexriv