XSbvvapec

class sherpa.astro.xspec.XSbvvapec(name='bvvapec')[source] [edit on github]

Bases: sherpa.astro.xspec.XSAdditiveModel

The XSPEC bvvapec model: velocity broadened APEC thermal plasma model.

The model is described at [1], with XSbapec describing how it is implemented in Sherpa.

kT

The temperature of the plasma, in keV.

H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar,
K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn

The abundance of the element in solar units.

Redshift

The redshift of the plasma.

Velocity

The gaussian sigma of the velocity broadening, in km/s.

norm

The normalization of the model: see [1] for an explanation of the units.

References

[1](1, 2) https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelBapec.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

thawedparhardmaxes
thawedparhardmins
thawedparmaxes
thawedparmins
thawedpars
version_enabled = True

Methods Documentation

apply(outer, *otherargs, **otherkwargs) [edit on github]
calc(pars, xlo, *args, **kwargs) [edit on github]
get_center() [edit on github]
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.

regrid(*arrays) [edit on github]
reset() [edit on github]
set_center(*args, **kwargs) [edit on github]
startup(cache) [edit on github]

Called before a model may be evaluated multiple times.

See also

teardown()

teardown() [edit on github]

Called after a model may be evaluated multiple times.

See also

setup()