set_xsxsect

Context: modeling

Synopsis

Set XSPEC photoelectric cross-section

Syntax

set_xsxsect(cross-section)
get_xsxsect()

Description

The set_xsxsect command sets the photoelectric cross-section used in XSpec absorption models. The get_xsxsect command returns the current setting.

Available Cross-sections

Name	Description
bcmc	default value; Balucinska-Church & McCammon (1992, ApJ 400, 699) with a new He cross-section based on (1998, ApJ 496, 1044)
obcm	bcmc with the old He cross-section
vern	Verner et al. (1996, ApJ 465, 487)

XSpec version

This information is taken from the XSpec User's Guide. Version 12.7.1 of the XSpec models is supplied with CIAO 4.4.1.

Example

sherpa> print get_xsxsect()
bcmc
sherpa> set_xsxsect("vern")
Cross Section Table set to vern: Verner, Ferland, Korista, and Yakovlev
1996

The current cross-section setting is retrieved ("bcmc", the default). It is then changed to "vern".

Bugs

For a list of known bugs and issues with the XSPEC models, please visit the XSPEC bugs page.

confidence: set_conf_opt, set_covar_opt, set_proj_opt
data: get_bkg_plot, set_areascal, set_arf, set_backscal, set_bkg, set_coord, set_counts, set_data, set_exposure, set_grouping, set_quality, set_rmf, set_staterror, set_syserror
filtering: set_filter
info: list_model_ids, show_bkg_model, show_bkg_source
methods: set_iter_method, set_iter_method_opt, set_method, set_method_opt
modeling: add_model, add_user_pars, clean, create_model_component, delete_bkg_model, delete_model, delete_model_component, get_model, get_model_autoassign_func, get_model_component, get_model_component_image, get_model_component_plot, get_model_plot, get_num_par, get_order_plot, get_par, get_pileup_model, get_source, get_source_component_image, get_source_component_plot, image_model, image_model_component, image_source, image_source_component, integrate, integrate1d, link, load_table_model, load_template_model, load_user_model, normal_sample, reset, save_model, save_source, set_bkg_model, set_full_model, set_model_autoassign_func, set_par, set_pileup_model, set_source, set_xsabund, set_xscosmo, set_xsxset, t_sample, uniform_sample
plotting: get_lrt_plot, get_lrt_results, get_pvalue_plot, get_pvalue_results, plot_cdf, plot_lrt, plot_model, plot_model_component, plot_pdf, plot_pvalue, plot_scatter, plot_source, plot_source_component, plot_trace
psfs: delete_psf, load_conv
saving: save_delchi, save_resid
statistics: set_prior, set_sampler, set_sampler_opt, set_stat
utilities: calc_chisqr, calc_energy_flux, calc_model_sum, calc_photon_flux, calc_source_sum, calc_stat, eqwidth, set_analysis, set_default_id
visualization: contour_model, contour_ratio, contour_resid, get_ratio, get_resid, image_setregion