    The XSPEC jet model: Leptonic relativistic jet model.

xsjet
The xsjet model is an additive model component.

The model is described at [1] .

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

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

mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.mass frozen 1e+09 1 1e+10 solar mdl.Dco frozen 3350.6 1 1e+08 Mpc mdl.log_mdot thawed -1 -5 2 logL/LEdd mdl.thetaobs frozen 3 0 90 deg mdl.BulkG frozen 13 1 100 mdl.phi frozen 0.1 0.01 100 rad mdl.zdiss frozen 1275 10 10000 Rg mdl.B frozen 2.6 0.01 15 Gau mdl.logPrel frozen 43.3 40 48 mdl.gmin_inj frozen 1 1 1000 mdl.gbreak frozen 300 10 10000 mdl.gmax frozen 3000 1000 1e+06 mdl.s1 frozen 1 -1 1 mdl.s2 frozen 2.7 1 5 mdl.z frozen 0 0 10 mdl.norm frozen 1 0 1e+24

ATTRIBUTES

The attributes for this object are:

Attribute
Definition
mass
Black hole mass, in solar masses.
Dco
Comoving distance, as in XSoptxagnf.
log_mdot
log (accretion power / Eddington luminosity), in units of log L / logLEdd. See [1] for a full discussion of this parameter.
thetaobs
The inclination angle (deg) between the jet axis and line of sight.
BulkG
Bulk lorentz factor of the jet.
phi
The angular size scale - in radians - of the jet acceleration region as seen from the black hole. See [1] for more details.
zdiss
The vertical distance from the black hole of the jet dissipation region, in units of Rg=GM/c^2. See [1] for more details.
B
The magnetic field (in Gauss) in the jet.
logPrel
The log of the power injected in relativisitic particles, which is measured in ergs/s.
gmin_inj
The minimum lorentz factor of the injected electrons.
gbreak
The lorentz factor of the break in injected electron distribution.
gmax
The maximum lorentz factor.
s1
The injected index of the electron distribution below the break.
s2
The injected index of the electron distribution above the break.
z
The cosmological redshift corresponding to the Dco parameter.
norm
MUST BE FIXED AT UNITY as the jet spectrum normalisation is set by the relativisitic particle power.

References

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