    The XSPEC nteea model: non-thermal pair plasma.

xsnteea
The xsnteea model is an additive model component.

The model is described at [1] .

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

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

mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.l_nth thawed 100 0 10000 mdl.l_bb thawed 100 0 10000 mdl.f_refl thawed 0 0 4 mdl.kT_bb frozen 10 1 100 mdl.g_max frozen 1000 5 10000 mdl.l_th frozen 0 0 10000 mdl.tau_p frozen 0 0 10 mdl.G_inj frozen 0 0 5 mdl.g_min frozen 1.3 1 1000 mdl.g_0 frozen 1.3 1 5 mdl.radius frozen 1e+13 100000 1e+16 mdl.pair_esc frozen 0 0 1 mdl.cosIncl thawed 0.45 0.05 0.95 mdl.Fe_abund frozen 1 0.1 10 mdl.redshift frozen 0 -0.999 10 mdl.norm thawed 1 0 1e+24

ATTRIBUTES

The attributes for this object are:

Attribute
Definition
l_nth
The nonthermal electron compactness.
l_bb
The blackbody compactness.
f_refl
The scaling factor for reflection. This is 1 for an isotropic source above the disk.
kT_bb
The blackbody temperature in eV.
g_max
The maximum Lorentz factor.
l_th
The thermal compactness. Set to 0 for a pure nonthermal plasma.
tau_p
The Thomson optical depth of ionization electrons.
G_inj
The electron injection index (0 for monoenergetic injection).
g_min
The minimum Lorentz factor of the power law injection (not used for monoenergetic injection).
g_0
The minimum Lorentz factor for nonthermal reprocessing, in the range (1, g_min].
radius
The radius in cm (for Coulomb/bremsstrahlung only).
pair_esc
The pair escape rate in c.
cosIncl
The cosine of the inclination angle.
Fe_abund
The iron abundance relative to that set by the set_xsabund

function.
redshift
The redshift of the source.
norm
The normalization of the model: see [1] for more details.

Notes

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

References

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

XSPEC version

CIAO 4.16 comes with support for version 12.13.1e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec; print(xspec.get_xsversion())'12.13.1e

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

December 2023