XSvpshock¶
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class
sherpa.astro.xspec.
XSvpshock
(name='vpshock')[source] [edit on github]¶ Bases:
sherpa.astro.xspec.XSAdditiveModel
The XSPEC vpshock model: plane-parallel shocked plasma, constant temperature.
The model is described at [1]. The
set_xsxset
andget_xsxset
functions are used to set and query the XSPEC XSET parameters, in particular the keyword “NEIVERS”.-
kT
¶ The temperature of the plasma, in keV.
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H
¶ The H abundance: it should be set to 0 to switch on and 1 to switch off the free-free continuum.
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He, C, N, O, Ne, Mg, Si, S, Ar, Ca, Fe, Ni
The abundance of the element in solar units.
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Tau_l
¶ The lower limit on the ionization timescale, in s/cm^3.
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Tau_u
¶ The upper limit on the ionization timescale, in s/cm^3.
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redshift
¶ The redshift of the plasma.
See also
References
[1] (1, 2) https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelPshock.html Attributes Summary
thawedparhardmaxes
thawedparhardmins
thawedparmaxes
thawedparmins
thawedpars
version_enabled
Methods Summary
apply
(outer, *otherargs, **otherkwargs)calc
(pars, xlo, *args, **kwargs)get_center
()guess
(dep, *args, **kwargs)Set an initial guess for the parameter values. regrid
(*arrays)reset
()set_center
(*args, **kwargs)startup
(cache)Called before a model may be evaluated multiple times. teardown
()Called after a model may be evaluated multiple times. Attributes Documentation
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thawedparhardmaxes
¶
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thawedparhardmins
¶
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thawedparmaxes
¶
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thawedparmins
¶
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thawedpars
¶
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version_enabled
= True¶
Methods Documentation
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apply
(outer, *otherargs, **otherkwargs) [edit on github]¶
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calc
(pars, xlo, *args, **kwargs) [edit on github]¶
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get_center
() [edit on github]¶
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guess
(dep, *args, **kwargs) [edit on github]¶ Set an initial guess for the parameter values.
Attempt to set the parameter values, and ranges, for the model to match the data values. This is intended as a rough guess, so it is expected that the model is only evaluated a small number of times, if at all.
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regrid
(*arrays) [edit on github]¶
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reset
() [edit on github]¶
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set_center
(*args, **kwargs) [edit on github]¶
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startup
(cache) [edit on github]¶ Called before a model may be evaluated multiple times.
See also
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teardown
() [edit on github]¶ Called after a model may be evaluated multiple times.
See also
setup()
-