Synopsis
Return the background ARF associated with a PHA data set.
Syntax
get_bkg_arf(id=None)
Description
This is for the case when there is only one background component and one background response. If this does not hold, use `get_arf` and use the bkg_id and resp_id arguments.
Examples
Example 1
Return the exposure field of the ARF from the background of the default data set:
>>> get_bkg_arf().exposure
Example 2
Copy the ARF from the default data set to data set 2, as the first component:
>>> arf1 = get_bkg_arf() >>> set_arf(2, arf1, bkg_id=1)
PARAMETERS
The parameter for this function is:
| Parameter | Type information | Definition |
|---|---|---|
| id | int, str, or None, optional | The data set to use. If not given then the default identifier is used, as returned by `get_default_id` . |
Return value
The return value from this function is:
arf -- This is a reference to the ARF, rather than a copy, so that changing the fields of the object will change the values in the data set.
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.
See Also
- confidence
- get_conf, get_conf_results, get_covar, get_covar_opt, get_covar_results, get_covariance_results, get_int_proj, get_int_unc, get_proj, get_proj_opt, get_proj_results, get_projection_results, get_reg_proj, get_reg_unc
- contrib
- get_chart_spectrum, get_marx_spectrum
- data
- get_areascal, get_arf, get_arf_plot, get_axes, get_backscal, get_bkg, get_bkg_chisqr_plot, get_bkg_delchi_plot, get_bkg_fit_plot, get_bkg_model, get_bkg_model_plot, get_bkg_plot, get_bkg_ratio_plot, get_bkg_resid_plot, get_bkg_rmf, get_bkg_scale, get_bkg_source, get_bkg_source_plot, get_coord, get_counts, get_data, get_data_contour, get_data_contour_prefs, get_data_image, get_data_plot, get_data_plot_prefs, get_dep, get_dims, get_error, get_exposure, get_grouping, get_indep, get_quality, get_rmf, get_specresp, get_staterror, get_syserror, load_arf, load_bkg_arf, load_bkg_rmf, load_multi_arfs, load_multi_rmfs, load_rmf, set_arf, set_bkg, set_rmf, subtract, unpack_arf, unpack_rmf, unsubtract
- filtering
- get_filter
- fitting
- calc_stat_info, get_stat_info
- info
- get_default_id, list_bkg_ids, list_response_ids, list_stats, show_bkg_model, show_bkg_source
- methods
- get_draws, get_iter_method_name, get_iter_method_opt, get_method, get_method_name, get_method_opt
- modeling
- delete_bkg_model, get_model, get_model_component, get_model_component_image, get_model_component_plot, get_model_plot, get_num_par, get_num_par_frozen, get_num_par_thawed, get_order_plot, get_par, get_pileup_model, get_response, get_source, get_source_component_image, get_source_component_plot, get_source_contour, get_source_image, get_source_plot, image_source
- plotting
- get_split_plot, plot_arf, plot_bkg, plot_bkg_chisqr, plot_bkg_delchi, plot_bkg_fit, plot_bkg_fit_delchi, plot_bkg_fit_resid, plot_bkg_model, plot_bkg_ratio, plot_bkg_resid, plot_bkg_source
- psfs
- get_psf, get_psf_contour, get_psf_image, get_psf_plot
- statistics
- get_chisqr_plot, get_delchi_plot, get_prior, get_sampler, get_stat, get_stat_name
- utilities
- get_analysis, get_rate
- visualization
- image_getregion