xsoptxagnf

Context: models

Synopsis

The XSPEC optxagnf model: Colour temperature corrected disc and energetically coupled Comptonisation model for AGN.

Syntax

xsoptxagnf

The xsoptxagnf model is an additive model component.

Description

The model is described at [1] .

Deprecated in Sherpa 4.10.0

The loglledd parameter has been renamed logloledd to match the XSPEC definition. The name loglledd can still be used to access the parameter, but this name will be removed in a future release.

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.mass     frozen        1e+07            1        1e+09      solar
   mdl.dist     frozen          100         0.01        1e+09        Mpc
   mdl.logLoLEdd thawed           -1          -10            2           
   mdl.astar    frozen            0            0        0.998           
   mdl.rcor     thawed           10            1          100         rg
   mdl.logrout  frozen            5            3            7           
   mdl.kT_e     thawed          0.2         0.01           10        keV
   mdl.tau      thawed           10          0.1          100           
   mdl.Gamma    thawed          2.1         1.05           10           
   mdl.fpl      thawed       0.0001            0            1           
   mdl.Redshift frozen            0            0           10           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
mass	The black hole mass in solar masses.
dist	The comoving (proper) distance in Mpc.
logLoLEdd	The Eddington ratio.
astar	The dimensionless black hole spin.
rcor	The coronal radius in Rg=GM/c^2. See [1] for more details.
logrout	The log of the outer radius of the disk in units of Rg. See [1] for more details.
kT_e	The electron temperature for the soft Comptonisation component (soft excess), in keV.
tau	The optical depth of the soft Comptonisation component. If this parameter is negative then only the soft Compton component is used.
Gamma	The spectral index of the hard Comptonisation component ('power law') which has temperature fixed to 100 keV.
fpl	The fraction of the power below rcor which is emitted in the hard comptonisation component. If this parameter is negative then only the hard Compton component is used.
Redshift	The redshift.
norm	The normalization of the model. It must be frozen.

Notes

The minimum allowed value for the Gamma parameter has been changed from 0.5 to 1.05 to match the XSPEC 12.10.0 model.dat file.

References

[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelOptxagn.html

XSPEC version

CIAO 4.17 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.