Synopsis
The XSPEC sirf model: self-irradiated funnel.
Syntax
xssirf The xssirf model is an additive model component.
Description
The model is described at [1] .
Example
>>> create_model_component("xssirf", "mdl")
>>> print(mdl)Create a component of the xssirf model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.tin thawed 1 0.01 1000 keV mdl.rin thawed 0.01 1e-06 10 rsph mdl.rout thawed 100 0.1 1e+08 rsph mdl.theta thawed 22.9 0 90 deg mdl.incl frozen 0 -90 90 deg mdl.valpha frozen -0.5 -1.5 5 mdl.gamma frozen 1.333 0.5 10 mdl.mdot frozen 1000 0.5 1e+07 mdl.irrad frozen 2 0 20 mdl.norm thawed 1 0 1e+24
ATTRIBUTES
The attributes for this object are:
| Attribute | Definition |
|---|---|
| tin | The inner temperature (at the inner, inside-the-funnel photosphere), in keV. |
| rin | The inner (inner, inside-the-fulle photosphere) radius in "spherisation radius" units (see [1] for details). |
| rout | The outer photosphere radius in "spherisation radius" units |
| theta | The half-opening angle of the cone, in degrees. |
| incl | The inclination angle of the funnel, in degrees. Affects mainly self-occultation and relativistic boost effects. |
| valpha | The velocity law exponent. |
| gamma | The adiabatic index. It affects the inner, hotter parts of the flow, therefore we set is to 4/3 by default. |
| mdot | The mass ejection rate in Eddington (critical) units. |
| irrad | The number of iterations for irradiation. |
| norm | The normalization of the model. |
References
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.