set_xsabund
- sherpa.astro.xspec.set_xsabund(abundance)[source] [edit on github]
Set the elemental abundances used by X-Spec models.
Set the abundance table used in the X-Spec plasma emission and photoelectric absorption models. It is equivalent to the X-Spec
abund
command [1].- Parameters:
abundance (str) – A file name, format described below, or one of the pre-defined names listed in the Notes section below.
See also
Notes
The pre-defined abundance tables are:
‘angr’, from [2]
‘aspl’, from [3]
‘feld’, from [4], except for elements not listed which are given ‘grsa’ abundances
‘aneb’, from [5]
‘grsa’, from [6]
‘wilm’, from [7], except for elements not listed which are given zero abundance
‘lodd’, from [8]
‘lpgp’, from [9] (photospheric, requires XSPEC 12.12.0 or later)
‘lpgs’, from [9] (proto-solar, requires XSPEC 12.12.0 or later)
The values for these tables are given at [1].
Data files should be in ASCII format, containing a single numeric (floating-point) column of the abundance values, relative to Hydrogen.
The screen output of this function is controlled by the X-Spec chatter setting (
set_xschatter
).References
Examples
>>> set_xsabund('lodd') Solar Abundance Vector set to lodd: Lodders, K. ApJ 591, 1220 (2003)
>>> set_xsabund('abund.dat') Solar Abundance Vector set to file: User defined abundance vector / no description specified