set_xsxset

sherpa.astro.xspec.set_xsxset(name, value)

Set a X-Spec model setting.

Set variables used by X-Spec models. It is equivalent to the X-Spec xset command [1], but only for setting the model database settings. See set_xsabund, set_xscosmo, and set_xsxsect for the other settings.

Parameters:

• name (str) – The name of the setting. It is converted to upper case before being used. There is no check that the name is valid.
• value (str) – The new value of the setting. It must be given as a string.

See also

get_xsxset()

Return the value of X-Spec model settings.

get_xsversion()

Return the version of X-Spec used by this module.

set_xsabund()

Set the X-Spec abundance table.

set_xschatter()

Set the X-Spec chatter level.

set_xscosmo()

Set the X-Spec cosmology settings.

set_xsxsect()

Set the X-Spec photoelectric absorption cross-sections.

Notes

The available settings are listed at [1]. Not all the X-Spec model types are supported by Sherpa - for instance X-Spec “mixing models” - so changing some of these settings will make no difference. The X-Spec chatter setting can be increased with set_xschatter if it is not clear if a setting is being used.

The model settings are stored so that they can be included in the output of sherpa.astro.ui.utils.save_all.

References

[1]	(1, 2) http://heasarc.nasa.gov/xanadu/xspec/manual/XSabund.html Note that this may refer to a newer version than the compiled version used by Sherpa; use get_xsversion to check.

Examples

>>> set_xsxset('NEIVERS', '2.0')

>>> set_xsxset('NEIAPECROOT', '/data/spectral/modelData/APEC_nei_v11')

>>> set_xsxset('POW_EMIN', '0.5')
>>> set_xsxset('POW_EMAX', '2.0')