Last modified: December 2025

URL: https://cxc.cfa.harvard.edu/sherpa/ahelp/xsqsosed.html
AHELP for CIAO 4.18 Sherpa

xsqsosed

Context: models

Synopsis

The XSPEC qsosed model: AGN SED model

Syntax

xsqsosed

The xsqsosed model is an additive model component.

Description

The model is described at [1] .


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.mass     frozen        1e+07       100000        1e+10      solar
   mdl.dist     frozen          100         0.01        1e+09        Mpc
   mdl.logmdot  thawed           -1        -1.65         0.39       Ledd
   mdl.astar    frozen            0           -1        0.998           
   mdl.cosi     frozen          0.5         0.05            1           
   mdl.redshift frozen            0            0            5           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

Attribute Definition
mass The black hole mass, in solar units.
dist The comoving (proper) distance, in Mpc.
logmdot log of mdot, where mdot = Mdot/Mdot_Edd and eta Mdot_Edd c^2 = L_Edd
astar The black hole spin (dimensionless)
cosi The cosine of the inclination angle i for the warm Comptonising component and the outer disc.
redshift The redshift.
norm The normalization of the model.

References

[1]

XSPEC version

CIAO 4.18 comes with support for version 12.14.0k of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.14.0k

Bugs

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

See Also

models
xsagnsed