| AHELP for CIAO 4.5 Sherpa v1 | plot_chart_spectrum |
Context: contrib |
Synopsis
Plot up the model spectrum in the form required by ChaRT
Syntax
plot_chart_spectrum( [id=None, elow=None, ehigh=None, ewidth=None, norm=None] )
Description
The plot_chart_spectrum() command creates a plot of the current model values in the form expected by ChaRT, the Chandra Ray Tracer. Please see the ChaRT preparation thread for further information on how to use this routine.
Loading the routine
The routine can be loaded into Sherpa by saying:
from sherpa_contrib.chart import *
Arguments
| Name | Default value | Description |
|---|---|---|
| id | None (which means use the value of get_default_id) | Which dataset to use. |
| elow | None | The minimum energy at which to evaluate the model; this parameter controls the lower edge of the lowest-energy bin, and is in keV. A value of None means to use the lowest energy bin from the ARF grid. This value should not be smaller than 0.2 keV. |
| ehigh | None | The maximum energy at which to evaluate the model; this parameter controls the upper edge of the highest-energy bin, and is in keV. A value of None means to use the highest energy bin from the ARF grid. This valus should not be larger than 10 keV. |
| ewidth | None | The bin width to use, in keV. A value of None means to use the bin width from the ARF grid. |
| norm | None | A scaling factor to allow you to easily change the overall flux of the model. A value of None is equivalent to a factor of 1; a value of 10 would create a ChaRT spectral model ten times brighter than the input model. |
Example 1
sherpa> plot_chart_spectrum()
Create a plot of the model for the default dataset using the units expected by ChART.
Example 2
sherpa> plot_chart_spectrum(elow=1, ehigh=8)
In this example the plot is restricted to the range 1 to 8 keV, using the default binning given by the ARF grid. Note that this energy range need not overlap the range used to fit the data (or even the energy ranges of the ARF and RMF files). It should however remain within the range 0.2 to 10 keV.
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.
See Also
- contrib
- get_chart_spectrum, get_data_prof, get_data_prof_prefs, get_delchi_prof, get_delchi_prof_prefs, get_fit_prof, get_model_prof, get_model_prof_prefs, get_resid_prof, get_resid_prof_prefs, get_source_prof, get_source_prof_prefs, prof_data, prof_delchi, prof_fit, prof_fit_delchi, prof_fit_resid, prof_model, prof_resid, prof_source, save_chart_spectrum, sherpa_chart
- data
- get_arf_plot, get_bkg_plot
- modeling
- normal_sample, t_sample, uniform_sample
- plotting
- get_energy_flux_hist, get_lrt_plot, get_lrt_results, get_photon_flux_hist, get_pvalue_plot, get_pvalue_results, get_split_plot, plot, plot_arf, plot_bkg, plot_cdf, plot_chisqr, plot_data, plot_delchi, plot_energy_flux, plot_fit, plot_lrt, plot_model, plot_model_component, plot_order, plot_pdf, plot_photon_flux, plot_pvalue, plot_ratio, plot_resid, plot_scatter, plot_source, plot_source_component, plot_trace, set_xlinear, set_xlog, set_ylinear, set_ylog
- psfs
- plot_kernel
- statistics
- get_chisqr_plot, get_delchi_plot
- visualization
- contour_resid
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