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:
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
[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. [2] Anders E. & Grevesse N. (1989, Geochimica et Cosmochimica Acta 53, 197) http://adsabs.harvard.edu/abs/1989GeCoA..53..197A [3] Asplund M., Grevesse N., Sauval A.J. & Scott P. (2009, ARAA, 47, 481) http://adsabs.harvard.edu/abs/2009ARA%26A..47..481A [4] Feldman U.(1992, Physica Scripta 46, 202) http://adsabs.harvard.edu/abs/1992PhyS…46..202F [5] Anders E. & Ebihara (1982, Geochimica et Cosmochimica Acta 46, 2363) http://adsabs.harvard.edu/abs/1982GeCoA..46.2363A [6] Grevesse, N. & Sauval, A.J. (1998, Space Science Reviews 85, 161) http://adsabs.harvard.edu/abs/1998SSRv…85..161G [7] Wilms, Allen & McCray (2000, ApJ 542, 914) http://adsabs.harvard.edu/abs/2000ApJ…542..914W [8] Lodders, K (2003, ApJ 591, 1220) http://adsabs.harvard.edu/abs/2003ApJ…591.1220L 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