XSismabs¶
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class
sherpa.astro.xspec.
XSismabs
(name='ismabs')[source] [edit on github]¶ Bases:
sherpa.astro.xspec.XSMultiplicativeModel
The XSPEC ismabs model: A high resolution ISM absorption model with variable columns for individual ions.
The model is described at [1].
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H
¶ The equivalent hydrogen column (in units of 10^22 atoms/cm^2).
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HeII, CI, CII, CIII, NI, NII, NIII, OI, OII, OIII, NeI, NeII, NeIII,
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MgI, MgII, MgIII, Si_I, Si_II, Si_III, S_I, S_II, S_III,
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ArI, ArII, ArIII, CaI, CaII, CaIII, Fe
The column for the species (in units of 10^16 atoms/cm^2).
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redshift
¶ The redshift of the absorber.
Notes
As Sherpa parameter names are case insensitive the parameters for Silicon and Sulfur include an underscore character after the element name to avoid conflict: that is Si_I and S_I refer to the XSPEC SiI and SI parameters respectively.
References
[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelIsmabs.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, **kwargs)The class RegriddableModel1D allows the user to evaluate in the requested space then interpolate onto the data space. 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, **kwargs) [edit on github]¶ The class RegriddableModel1D allows the user to evaluate in the requested space then interpolate onto the data space. An optional argument ‘interp’ enables the user to change the interpolation method.
Examples
>>> import numpy as np >>> from sherpa.models.basic import Box1D >>> mybox = Box1D() >>> request_space = np.arange(1, 10, 0.1) >>> regrid_model = mybox.regrid(request_space, interp=linear_interp)
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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()
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