## Alphabetical List of Ahelp Files

Topic | Context | Summary | ||||
---|---|---|---|---|---|---|

A | absorptionedge | models | Optical model of interstellar absorption. | |||

absorptiongaussian | models | A Gaussian model of an absorption feature. | ||||

absorptionlorentz | models | A Lorentz model of an absorption feature. | ||||

absorptionvoigt | models | A Voigt model of an absorption feature. | ||||

accretiondisk | models | A model of emission due to an accretion disk. | ||||

add_model | modeling | Add a user-defined model class as a Sherpa model type | ||||

add_user_pars | modeling | Add parameters to a user-defined model | ||||

atten | models | Attenuation by ISM. | ||||

B | bbodyfreq | models | Blackbody as a function of frequency. | |||

bbody | models | Blackbody as a function of energy. | ||||

beta1d | models | 1-D Lorentz model with a varying power law. | ||||

beta2d | models | 2-D Lorentz model with a varying power law. | ||||

blackbody | models | Blackbody function | ||||

box1d | models | 1-D box function. | ||||

box2d | models | 2-D box function. | ||||

bpl1d | models | Broken power law function. | ||||

bremsstrahlung | models | Bremsstrahlung function | ||||

brokenpowerlaw | models | Broken power-law function | ||||

C | calc_chisqr | utilities | Calculate the Chi Squared statistic contribution per bin | |||

calc_data_sum2d | utilities | Calculate the sum of observed image counts | ||||

calc_data_sum | utilities | Calculate the sum of observed data counts | ||||

calc_energy_flux | utilities | Calculate the unconvolved model energy flux | ||||

calc_ftest | utilities | Calculate the significance using the F test | ||||

calc_kcorr | utilities | Calculate the k correction for a spectral model. | ||||

calc_mlr | utilities | Calculate the Maximum Likelihood Ratio test | ||||

calc_model_sum2d | utilities | Calculate the convolved 2D model amplitudes | ||||

calc_model_sum | utilities | Calculate the sum of convolved model counts | ||||

calc_photon_flux | utilities | Calculate the unconvolved model photon flux | ||||

calc_source_sum2d | utilities | Calculate the unconvolved 2D model amplitudes | ||||

calc_source_sum | utilities | Calculate the sum of unconvolved model amplitudes | ||||

calc_stat_info | fitting | Returns goodness-of-fit statistics associated with a Sherpa data set. | ||||

calc_stat | utilities | Calculate the fit statistic by data set ID | ||||

cash | statistics | A maximum likelihood function. | ||||

ccm | models | Interstellar extinction function | ||||

chi2constvar | statistics | Chi-square statistic with constant variance computed from the counts data. | ||||

chi2datavar | statistics | Chi-square statistic with variance computed from the data. | ||||

chi2gehrels | statistics | Chi-square statistic with the Gehrels variance function. | ||||

chi2modvar | statistics | Chi-square statistic with variance computed from model amplitudes. | ||||

chi2xspecvar | statistics | Chi-square statistic with variance computed from data amplitudes. | ||||

chisquare | statistics | About the chi-square statistic. | ||||

clean | modeling | Erase data and model settings in a Sherpa session | ||||

conf | confidence | Estimate confidence intervals for selected thawed parameters based on confidence method | ||||

const1d | models | 1-D constant amplitude model. | ||||

const2d | models | 2-D constant amplitude model. | ||||

contour_data | visualization | Open a contour plot of a data set in ChIPS | ||||

contour_fit_resid | visualization | Create a contour plot of the fit and residuals | ||||

contour_fit | visualization | Send a contour plot of the fit | ||||

contour_kernel | psfs | Create a contour plot of a PSF kernel | ||||

contour_model | visualization | Open a contour plot of a data set model in ChIPS | ||||

contour_psf | psfs | Create a contour plot of a PSF | ||||

contour_ratio | visualization | Open a contour plot of a data-to-model ratio in ChIPS | ||||

contour_resid | visualization | Open a contour plot of data-minus-model residuals in ChIPS | ||||

contour_source | visualization | Create a contour plot of the source | ||||

contour | visualization | Open a contour plot in ChIPS | ||||

copy_data | data | Copy a data set by data ID to a new data ID (deep copy) | ||||

cos | models | Cosine function. | ||||

covariance | confidence | Estimate confidence intervals for selected thawed parameters based on covariance method | ||||

create_model_component | modeling | Create a new model component | ||||

cstat | statistics | A maximum likelihood function | ||||

D | dataspace1d | data | Create a blank 1D dataset | |||

dataspace2d | data | Create a blank 2D dataset | ||||

delete_bkg_model | modeling | Delete a background model | ||||

delete_data | data | Delete a data set by ID | ||||

delete_model_component | modeling | Delete a model component | ||||

delete_model | modeling | Delete a Sherpa model by model ID | ||||

delete_psf | psfs | Delete a PSF model | ||||

delta1d | models | 1-D delta function. | ||||

delta2d | models | 2-D delta function. | ||||

dered | models | Dereddening function. | ||||

devaucouleurs2d | models | DeVaucouleurs profile. | ||||

E | edge | models | Photoabsorption edge model. | |||

emissiongaussian | models | A Gaussian model of an emission feature. | ||||

emissionlorentz | models | A Lorentz model of an emission feature. | ||||

emissionvoigt | models | Voigt model of an emission feature | ||||

eqwidth | utilities | Calculate the equivalent width of an emission or absorption line. | ||||

erfc | models | A 1-D complementary error function. | ||||

erf | models | A 1-D error function. | ||||

estimate_weighted_expmap | contrib | Return the estimated exposure map value by weighting an ARF by a spectral model. | ||||

exp10 | models | Exponential function, base 10. | ||||

exp | models | Exponential function. | ||||

F | fake_pha | data | Simulate a PHA dataset with faked counts using Poisson noise | |||

fake | data | Simulate a generic data set with a chosen model and add noise | ||||

fit | fitting | Perform a fit using current optimization method and fit statistic. | ||||

fm | models | Fitzpatrick and Massa extinction curve | ||||

freeze | modeling | Freeze model parameters, so they do not vary during a fit. | ||||

G | gamma | utilities | Calculate the Gamma function | |||

gauss1d | models | 1-D unnormalized Gaussian function. | ||||

gauss2d | models | 2-D unnormalized Gaussian function. | ||||

get_analysis | utilities | Return the current units setting for a PHA data set | ||||

get_areascal | data | Return the source or background pixel fractional area scale | ||||

get_arf_plot | data | Return the data and preferences defining an ARF plot | ||||

get_arf | data | Return a source or background ARF by data set ID | ||||

get_axes | data | Return the alternate grid of a data set | ||||

get_backscal | data | Return the source or background extraction region area | ||||

get_bkg_plot | data | Return the data and preferences defining a background plot. | ||||

get_bkg_scale | data | Returns the complete background scaling factor | ||||

get_bkg | data | Return the background data, ARF, RMF, or model. | ||||

get_chart_spectrum | contrib | Return the model spectrum in the form required by ChaRT | ||||

get_chisqr_plot | statistics | Return the data and preferences defining a chi^2 plot | ||||

get_conf | confidence | Return information regarding the confidence method. | ||||

get_coord | data | Return the coordinate system of an image | ||||

get_counts | data | Return the dependent variable array (e.g., counts) of a data set | ||||

get_covar | confidence | Return settings or results for the covariance method. | ||||

get_data_plot | data | Return a plot, contour, or image of the data, or the associated preferences | ||||

get_data_prof_prefs | contrib | The plot preferences for radial or elliptical profiles of imaging data. | ||||

get_data_prof | contrib | Return the data used to create the radial or elliptical profile of imaging data. | ||||

get_data | data | Return details of a Sherpa data set by ID. | ||||

get_default_id | info | Return the default data set ID in a Sherpa session. | ||||

get_delchi_plot | statistics | Return the data and preferences defining a delta chi plot | ||||

get_delchi_prof_prefs | contrib | The plot preferences for radial or elliptical profiles of the residuals (data - model)/error to imaging data. | ||||

get_delchi_prof | contrib | Return the data used to create the radial or elliptical profile of the residuals (data - model)/error to imaging data. | ||||

get_dep | data | Return the dependent variable array (e.g., counts) of a data set | ||||

get_dims | data | Return the length of the x-dimension of a data set | ||||

get_draws | methods | Run the pyBLoCXS MCMC-based algorithm using the current sampler. | ||||

get_energy_flux_hist | plotting | Calculate a histogram of a simulated energy flux probability distribution | ||||

get_error | data | Return the total errors on the counts of a data set | ||||

get_exposure | data | Return the exposure time for a source or background data set | ||||

get_filter | filtering | Return the filter of a data set | ||||

get_fit_prof | contrib | Return the data used to create the radial or elliptical profile of fits to imaging data. | ||||

get_fit | fitting | Return model fit information associated with a Sherpa data set. | ||||

get_grouping | data | Obtain the grouping flags from a data set | ||||

get_indep | data | Return the independent variable array of a data set | ||||

get_instmap_weights | contrib | Return the model spectrum in the form required by the spectrumfile parameter of mkinstmap | ||||

get_int_proj | confidence | Return the confidence data defining an interval projection plot | ||||

get_int_unc | confidence | Return the confidence data defining an int_unc() plot | ||||

get_iter_method_name | methods | Return the name of the current iterative fitting method | ||||

get_iter_method_opt | methods | Return the value of the specified option for the current iterative fitting method | ||||

get_kernel | psfs | Return kernel plot, image, and contour preferences. | ||||

get_lrt_plot | plotting | Access a histogram plot of likelihood ratio test results. | ||||

get_lrt_results | plotting | Access the simulation results of the likelihood ratio test. | ||||

get_method | methods | Return information on the optimization method | ||||

get_model_autoassign_func | modeling | Return the method for storing model identifiers | ||||

get_model_component_image | modeling | Returns the 2D data and coordinate settings defining the convolved model component image | ||||

get_model_component_plot | modeling | Returns the data and preferences defining the convolved model component plot | ||||

get_model_component | modeling | Returns the parameters for the specified model component | ||||

get_model_plot | modeling | Return a plot, contour, or image of a model, or the associated preferences | ||||

get_model_prof_prefs | contrib | The plot preferences for radial or elliptical profiles of the model (after any PSF convolution) for imaging data. | ||||

get_model_prof | contrib | Return the data used to create the radial or elliptical profile of the source model (after any PSF convolution) for imaging data. | ||||

get_model | modeling | Return the model, model parameters, or model type | ||||

get_num_par | modeling | Returns the number of parameters (total, frozen, or thawed) in a model. | ||||

get_order_plot | modeling | Return the data and preferences defining a plot of model spectral orders | ||||

get_par | modeling | Returns a model parameter. | ||||

get_photon_flux_hist | plotting | Calculate a histogram of a simulated photon flux probability distribution | ||||

get_pileup_model | modeling | Return the pileup model associated with a data set. | ||||

get_prior | statistics | Access the prior function associated with a Sherpa model parameter. | ||||

get_proj | confidence | Return information regarding the projection method. | ||||

get_psf | psfs | Return PSF model data and plot, image, and contour preferences. | ||||

get_pvalue_plot | plotting | Access a histogram plot of likelihood ratio test results. | ||||

get_pvalue_results | plotting | Access the simulation results of the likelihood ratio test. | ||||

get_quality | data | Obtain the quality flags from a data set | ||||

get_rate | utilities | Return the measured count rate of a data set | ||||

get_ratio | visualization | Return information on the ratio of data and model. | ||||

get_reg_proj | confidence | Return the confidence data defining a region projection contour plot | ||||

get_reg_unc | confidence | Return the confidence data defining a reg_unc() contour plot | ||||

get_resid_prof_prefs | contrib | The plot preferences for radial or elliptical profiles of the residuals (data - model) to imaging data. | ||||

get_resid_prof | contrib | Return the data used to create the radial or elliptical profile of the residuals (data - model) to imaging data. | ||||

get_resid | visualization | Return information on a contour plot of the residuals of data and model. | ||||

get_response | modeling | Get the associated instrument response model of a PHA data set by data ID | ||||

get_rmf | data | Return a source or background RMF by data set ID | ||||

get_sampler | statistics | Return information on the current pyBLoCXS sampler. | ||||

get_source_component_image | modeling | Returns the 2D data and coordinate settings defining the unconvolved model component image | ||||

get_source_component_plot | modeling | Returns the data and preferences defining the unconvolved model component plot | ||||

get_source_prof_prefs | contrib | The plot preferences for radial or elliptical profiles of the source model for imaging data. | ||||

get_source_prof | contrib | Return the data used to create the radial or elliptical profile of the source model (before any PSF convolution) for imaging data. | ||||

get_source | modeling | Return the unconvolved model associated with a Sherpa data set ID. | ||||

get_specresp | data | Return the effective area of a PHA spectrum | ||||

get_split_plot | plotting | Return plot attributes for multiple plots | ||||

get_staterror | data | Return the statistical errors on the counts of a data set | ||||

get_stat_info | fitting | Parses the goodness-of-fit statistic information returned by calc_stat_info() | ||||

get_stat | statistics | Return information on the fit statistic | ||||

get_syserror | data | Return the systematic errors on the counts of a data set | ||||

gridsearch | methods | Grid searching optimization method | ||||

group | data | Enable and specify the grouping settings of a spectral data set | ||||

guess | modeling | Estimate initial parameter values and ranges | ||||

H | histogram1d | visualization | Create a 1D histogram from a binned grid and array of samples | |||

histogram2d | visualization | Create a 2D histogram from a pair of axes and a pair of sample arrays | ||||

hubblereynolds | models | Hubble-Reynolds profile. | ||||

I | igamc | utilities | Calculate the complement of the regularized incomplete Gamma function (upper) | |||

igam | utilities | Calculate the regularized incomplete Gamma function (lower) | ||||

ignore2d_id | filtering | Apply an exclude region filter to 2-D data by data set ID(s). | ||||

ignore2d | filtering | Apply an exclude region filter to all 2-D data sets | ||||

ignore_bad | filtering | Ignore bins according to quality flags | ||||

ignore_id | filtering | Apply an exclude filter to 1-D data by data set ID | ||||

ignore | filtering | Apply an exclude filter to all 1D data sets | ||||

image_close | visualization | Close the imager window (i.e., exit ds9). | ||||

image_data | visualization | Send image of 2-D data to ds9. | ||||

image_deleteframes | visualization | Delete frames in the imager window (ds9). | ||||

image_fit | visualization | Send image of the fit results to ds9. | ||||

image_getregion | visualization | Returns a region description from ds9. | ||||

image_kernel | psfs | Send a PSF kernel image to the imager (ds9). | ||||

image_model_component | modeling | Sends image of the convolved model component to ds9. | ||||

image_model | modeling | Send image of the model to ds9. | ||||

image_open | visualization | Open the imager window (i.e., start ds9). | ||||

image_psf | psfs | Send a PSF image to the imager (ds9). | ||||

image_ratio | visualization | Send image of the ratio (i.e., data/model) to ds9. | ||||

image_resid | visualization | Send image of the residuals (i.e., data - model) to ds9. | ||||

image_setregion | visualization | Sends a region description to ds9, where it is drawn in the current frame. | ||||

image_source_component | modeling | Sends image of the unconvolved model component to ds9. | ||||

image_source | modeling | Image the 2-D unconvolved model | ||||

image_xpaget | visualization | Retrieve data from ds9 using XPA. | ||||

image_xpaset | visualization | Send data to ds9 using XPA. | ||||

incbet | utilities | Calculate the incomplete Beta function | ||||

integrate1d | modeling | Helper function to control the integration of 1D non-XSpec model expressions | ||||

integrate | modeling | Controlling the integration of model components | ||||

int_proj | confidence | Create a confidence plot of fit statistic vs. parameter value. | ||||

int_unc | confidence | Create a confidence plot of fit statistic vs. parameter value. | ||||

J | jdpileup | models | A CCD pileup model developed by John Davis of MIT. | |||

L | leastsq | statistics | Chi-square statistic with variance set to 1. | |||

levmar | methods | Levenberg-Marquardt optimization method | ||||

lgam | utilities | Calculate the log of the Gamma function | ||||

linebroad | models | Line-broadening profile. | ||||

link | modeling | Link a model parameter to another model parameter. | ||||

list_bkg_ids | info | List all background IDs associated with a data set. | ||||

list_data_ids | info | List all data set IDs in a Sherpa session. | ||||

list_functions | info | List all available Sherpa functions | ||||

list_iter_methods | methods | List all Sherpa iterative fitting methods. | ||||

list_methods | methods | List all Sherpa optimization methods. | ||||

list_models | models | List all Sherpa models. | ||||

list_model_components | models | List all models established in a Sherpa session. | ||||

list_model_ids | info | List all current model IDs. | ||||

list_priors | statistics | List thawed Sherpa model parameters with associated priors. | ||||

list_response_ids | info | List all response IDs associated with a data set. | ||||

list_samplers | statistics | List all available pyBLoCXS samplers. | ||||

list_stats | info | List all Sherpa fit statistics. | ||||

lmc | models | Extinction curve for the Large Magellanic Cloud | ||||

load_arf | data | Load a source or background ARF | ||||

load_arrays | data | Load data from variables containing arrays. | ||||

load_ascii | data | Load ASCII data | ||||

load_bkg_arf | data | Load a background ARF | ||||

load_bkg_rmf | data | Load a background RMF | ||||

load_bkg | data | Load a PHA background spectrum | ||||

load_conv | psfs | Load a 1D convolution kernel | ||||

load_data | data | Load 1D data from a file | ||||

load_filter | filtering | Load filter from a FITS table, FITS image, or ASCII file | ||||

load_grouping | data | Load a grouping scheme from a FITS table or ASCII file | ||||

load_image | data | Load an image | ||||

load_multi_arfs | data | Load multiple ARFs | ||||

load_multi_rmfs | data | Load multiple RMFs | ||||

load_pha | data | Load PHA source spectra | ||||

load_psf | psfs | Load a PSF model | ||||

load_quality | data | Load quality flags from a FITS table or ASCII file | ||||

load_rmf | data | Load a source or background RMF | ||||

load_staterror | data | Load statistical errors | ||||

load_syserror | data | Load systematic errors | ||||

load_table_model | modeling | Load data into a table model | ||||

load_table | data | Load tabular data | ||||

load_template_model | modeling | Load a set of template models | ||||

load_user_model | modeling | Load a user-defined model | ||||

load_user_stat | statistics | Load a user-defined fit statistic | ||||

log10 | models | Logarithm function, base 10. | ||||

logabsorption | models | Logarithmic absorption model | ||||

logemission | models | Logarithmic emission model | ||||

logparabola | models | Log-parabolic function | ||||

log | models | Natural logarithm function. | ||||

lorentz1d | models | 1-D normalized Lorentzian function. | ||||

lorentz2d | models | 2-D unnormalized Lorentzian function. | ||||

M | models | models | Summary of Available Models | |||

moncar | methods | Monte Carlo optimization method | ||||

N | neldermead | methods | Nelder-Mead Simplex optimization method | |||

normal_sample | modeling | Sample the current set of thawed parameters from a uni-variate or multi-variate normal distribution. | ||||

normbeta1d | models | 1-D normalized beta function. | ||||

normgauss1d | models | 1-D normalized Gaussian function. | ||||

normgauss2d | models | 2-D normalized Gaussian function. | ||||

notice2d_id | filtering | Apply an include filter to 2D data by dataset id | ||||

notice2d | filtering | Apply an include filter to all 2D datasets | ||||

notice_id | filtering | Apply an include filter to 1D data by dataset id | ||||

notice | filtering | Apply an include filter to all 1D datasets | ||||

O | opticalgaussian | models | Gaussian model of an absorption feature | |||

P | pack_image | data | Pack image data into an IMAGECrate | |||

pack_pha | data | Pack PHA data into a PHACrate | ||||

pack_table | data | Pack tabular data into a TABLECrate | ||||

paramprompt | modeling | Toggle parameter prompting for initial model values | ||||

plot_arf | plotting | Plot an ARF | ||||

plot_bkg | plotting | Plot information about background data | ||||

plot_cdf | plotting | Plot a cumulative distribution function with lower, median, and upper quantiles. | ||||

plot_chart_spectrum | contrib | Plot up the model spectrum in the form required by ChaRT | ||||

plot_chisqr | plotting | Plot the chi-squared statistic | ||||

plot_data | plotting | Plot the dataset | ||||

plot_delchi | plotting | Plot the delchi residuals of the fit: (data-model)/error | ||||

plot_energy_flux | plotting | Plot the calculated energy flux distribution | ||||

plot_fit | plotting | Plot the fit, fit plus delta chi, or fit plus residuals | ||||

plot_instmap_weights | contrib | Plot up the model spectrum in the form required by mkinstmap | ||||

plot_kernel | psfs | Plot the PSF kernel | ||||

plot_lrt | plotting | Plot a histogram of likelihood ratio test results. | ||||

plot_model_component | plotting | Plots individual convolved source model components | ||||

plot_model | plotting | Plot the convolved source model | ||||

plot_order | plotting | Plot the convolved source model by order | ||||

plot_pdf | plotting | Plot a binned probability density function. | ||||

plot_photon_flux | plotting | Plot the calculated photon flux distribution | ||||

plot_psf | psfs | Plot the PSF | ||||

plot_pvalue | plotting | Plot a histogram of likelihood ratio test results. | ||||

plot_ratio | plotting | Plot the (data/model) ratio | ||||

plot_resid | plotting | Plot the residuals of the fit: (data - model) | ||||

plot_scatter | plotting | Create an X,Y scatter plot. | ||||

plot_source_component | plotting | Plots individual unconvolved source model components | ||||

plot_source | plotting | Plot the unconvolved source model | ||||

plot_trace | plotting | Create a trace plot of iteration number vs. sampled value. | ||||

plot | plotting | Plot multiple objects (data, model, residuals, etc.) | ||||

poisson | models | Poisson function. | ||||

polynom1d | models | 1-D polynomial function. | ||||

polynom2d | models | 2-D polynomial function. | ||||

polynomial | models | 1-D polynomial function of order <= 5 | ||||

powerlaw | models | Power law function | ||||

powlaw1d | models | 1-D power law. | ||||

prof_data | contrib | Plot a radial or elliptical profile of imaging data. | ||||

prof_delchi | contrib | Plot a radial or elliptical profile of the residuals (data - model)/error to imaging data. | ||||

prof_fit_delchi | contrib | Plot a radial or elliptical profile of the fit (data and model) and residuals (data-model)/error to imaging data. | ||||

prof_fit_resid | contrib | Plot a radial or elliptical profile of the fit (data and model) and residuals (data-model) to imaging data. | ||||

prof_fit | contrib | Plot a radial or elliptical profile of the fit (data and model) to imaging data. | ||||

prof_model | contrib | Plot a radial or elliptical profile of the model (after any PSF convolution) for imaging data. | ||||

prof_resid | contrib | Plot a radial or elliptical profile of the residuals (data - model) to imaging data. | ||||

prof_source | contrib | Plot a radial or elliptical profile of the source model for imaging data. | ||||

projection | confidence | Estimate confidence intervals for selected thawed parameters based on projection method | ||||

pyblocxs | methods | MCMC-based algorithm for Bayesian Low-Count X-ray Spectral (BLoCXS) analysis | ||||

R | rebin | visualization | Rebin a histogram | |||

recombination | models | Model of continuum emission due to recombination | ||||

reg_proj | confidence | Create a confidence contour of fit statistic vs. two thawed parameter values. | ||||

reg_unc | confidence | Create a confidence contour of fit statistic vs. two thawed parameter values. | ||||

reset | modeling | Reset model parameter values after a fit | ||||

restore | saving | Restore a previous Sherpa session from a file | ||||

S | sample_energy_flux | utilities | Sample the energy flux distribution | |||

sample_photon_flux | utilities | Sample the photon flux distribution | ||||

save_all | saving | Save all the information about the current session | ||||

save_arrays | saving | Save a list of arrays as columns to a FITS table or ASCII file | ||||

save_chart_spectrum | contrib | Write out the model spectrum in the form required by ChaRT | ||||

save_data | saving | Save a Sherpa data set to an ASCII file. | ||||

save_delchi | saving | Save the delta chi fit residuals to a FITS table or ASCII file | ||||

save_error | saving | Save total errors to a FITS table or ASCII file | ||||

save_filter | saving | Save filter to a FITS table or ASCII file | ||||

save_grouping | saving | Save grouping flags to a FITS table or ASCII file | ||||

save_image | saving | Save image data to a file | ||||

save_instmap_weights | contrib | Write out the model spectrum in the form required by mkinstmap | ||||

save_model | modeling | Save the convolved source model to a FITS table or ASCII file | ||||

save_pha | saving | Save a Sherpa data set to a PHA file. | ||||

save_quality | saving | Save quality flags to a FITS table or ASCII file | ||||

save_resid | saving | Save the simple data-model difference residuals | ||||

save_source | modeling | Save the unconvolved source model to a FITS table or ASCII file | ||||

save_staterror | saving | Save statistical errors to a FITS table or ASCII file | ||||

save_syserror | saving | Save systematic errors to a FITS table or ASCII file | ||||

save_table | saving | Save a Sherpa data set to a FITS or ASCII file. | ||||

save | saving | Save the current Sherpa session to a file | ||||

scale1d | models | 1-D constant amplitude model. | ||||

scale2d | models | 2-D constant amplitude model. | ||||

schechter | models | Schechter function. | ||||

script | saving | Save every command typed in a Sherpa or ChIPS session to a file. | ||||

seaton | models | Galactic extinction model | ||||

set_analysis | utilities | Set the units for spectral analysis | ||||

set_areascal | data | Set the fractional area | ||||

set_arf | data | Set an ARF dataset | ||||

set_backscal | data | Set the extraction region area | ||||

set_bkg_model | modeling | Set a background model expression | ||||

set_bkg | data | Set a background PHA dataset | ||||

set_conf_opt | confidence | Set the options for confidence | ||||

set_coord | data | Set the image coordinate system | ||||

set_counts | data | Set the dependent variable (e.g. counts) of a dataset | ||||

set_covar_opt | confidence | Set the options for covariance | ||||

set_data | data | Set a source dataset | ||||

set_default_id | utilities | Set the default Sherpa data id | ||||

set_exposure | data | Set the exposure time | ||||

set_filter | filtering | Apply user-defined filter to a data set | ||||

set_full_model | modeling | Set the complete convolved source and background model expressions to be used for fitting a data set | ||||

set_grouping | data | Apply user-defined grouping to a dataset | ||||

set_iter_method_opt | methods | Set the value of the specified option for the current iterative fitting method | ||||

set_iter_method | methods | Set the iterative fitting method | ||||

set_method_opt | methods | Set the options of the chosen optimization method | ||||

set_method | methods | Set the optimization method | ||||

set_model_autoassign_func | modeling | Define a method for storing model identifiers | ||||

set_par | modeling | Set initial values for a model parameter | ||||

set_pileup_model | modeling | Set a pileup model to be used in fitting a dataset | ||||

set_prior | statistics | Define a prior function for a particular Sherpa model parameter. | ||||

set_proj_opt | confidence | Set the options for projection | ||||

set_psf | psfs | Convolve the PSF model with the source model | ||||

set_quality | data | Apply user-defined quality flags to a data set | ||||

set_rmf | data | Set an RMF dataset | ||||

set_sampler_opt | statistics | Define sampler options for a pyBLoCXS chain. | ||||

set_sampler | statistics | Set the current pyBLoCXS sampler. | ||||

set_source | modeling | Set the source model expression to be used for fitting a dataset | ||||

set_staterror | data | Set the statistical errors | ||||

set_stat | statistics | Set the statistical method | ||||

set_syserror | data | Set the systematic errors | ||||

set_xlinear | plotting | Changes the plot X axis to use a linear scale. | ||||

set_xlog | plotting | Changes the plot x axis to use a logarithmic scale. | ||||

set_xsabund | modeling | Set XSPEC solar abundance | ||||

set_xscosmo | modeling | Set XSPEC cosmology settings (H0, q0, L0) | ||||

set_xsxsect | modeling | Set XSPEC photoelectric cross-section | ||||

set_xsxset | modeling | Set environment variables for XSPEC models | ||||

set_ylinear | plotting | Changes the plot Y axis to use a linear scale. | ||||

set_ylog | plotting | Changes the plot Y axis to use a logarithmic scale. | ||||

sherparc | sherpa | The .sherpa.rc file provides user-configuration options for Sherpa | ||||

sherpa_chart | contrib | Create and view spectral files for ChaRT (CIAO contributed package). | ||||

sherpa_contrib | contrib | Contributed CIAO routines for Sherpa. | ||||

sherpa_profiles | contrib | Radial profiles of imaging data in Sherpa (CIAO contributed package). | ||||

sherpa_utils | contrib | Utility routines for Sherpa (CIAO contributed package). | ||||

sherpa | sherpa | Introduction to Sherpa, the CIAO modeling and fitting package | ||||

show_all | info | Reports the current state of the Sherpa session | ||||

show_bkg_model | info | Display the background convolved model | ||||

show_bkg_source | info | Display the background unconvolved model | ||||

show_bkg | info | Display PHA background data set information | ||||

show_conf | info | Display the confidence information | ||||

show_covar | info | Display the covariance information | ||||

show_data | info | Display the data sets | ||||

show_filter | filtering | Display the filters applied to a dataset | ||||

show_fit | info | Display the fit information | ||||

show_kernel | psfs | Display the PSF kernel | ||||

show_method | info | Display the optimization method | ||||

show_model | info | Display the convolved source model | ||||

show_proj | info | Display the projection information | ||||

show_psf | psfs | Display the PSF model | ||||

show_source | info | Display the unconvolved source model | ||||

show_stat | info | Display the fit statistic | ||||

sin | models | Sine function. | ||||

smc | models | Extinction curve for the Small Magellanic Cloud | ||||

sm | models | Galactic extinction curve | ||||

sqrt | models | Square root function. | ||||

stephi1d | models | 1-D step function. | ||||

steplo1d | models | 1-D step function. | ||||

subtract | data | Perform background subtraction | ||||

T | tablemodel | models | Using an n-dimensional array of values as a model (table model). | |||

tan | models | Tangent function. | ||||

thaw | modeling | Thaw model parameters so they vary during a fit | ||||

t_sample | modeling | Sample the current set of thawed parameters from a Student's t-distribution. | ||||

U | ungroup | data | Ungroup PHA data | |||

uniform_sample | modeling | Sample the current set of thawed parameters from a uniform distribution. | ||||

unlink | modeling | Remove a link between model parameters | ||||

unpack_arf | data | Unpack an ARF from an ARFCrate | ||||

unpack_arrays | data | Unpack arrays from a CrateData object | ||||

unpack_ascii | data | Unpack ASCII data from a crate | ||||

unpack_bkg | data | Unpack PHA data from a PHACrate | ||||

unpack_data | data | Unpack a table data, ASCII data, or a spectrum from a crate | ||||

unpack_image | data | Unpack image data from an IMAGECrate | ||||

unpack_pha | data | Unpack PHA data from a PHACrate | ||||

unpack_rmf | data | Unpack an RMF from a crate | ||||

unpack_table | data | Unpack tabular data from a TABLECrate | ||||

unsubtract | data | Undo background subtraction | ||||

X | xgal | models | Extragalactic extinction function | |||

xsabsori | models | Ionized absorber. XSpec model. | ||||

xsacisabs | models | Decay in the ACIS quantum efficiency. XSpec model. | ||||

xsapec | models | APEC thermal plasma model. XSpec model. | ||||

xsbapec | models | APEC thermal plasma model with velocity broadening as a free parameter. XSpec model. | ||||

xsbbodyrad | models | Blackbody spectrum with norm proportional to surface area. XSpec model. | ||||

xsbbody | models | Blackbody spectrum. XSpec model. | ||||

xsbexrav | models | E-folded broken power law reflected from neutral matter. XSpec model. | ||||

xsbexriv | models | E-folded broken power law reflected from ionized matter. XSpec model. | ||||

xsbkn2pow | models | Broken power law, two break energies. XSpec model. | ||||

xsbknpower | models | Broken power law. XSpec model. | ||||

xsbmc | models | Comptonization by relativistically moving matter. XSpec model. | ||||

xsbremss | models | Thermal bremsstrahlung. XSpec model. | ||||

xsbvapec | models | APEC thermal plasma model with variable abundances and velocity broadening as a free parameter. XSpec model. | ||||

xsbvvapec | models | APEC thermal plasma model with variable abundances and velocity broadening as a free parameter. XSpec model. | ||||

xsc6mekl | models | 6th-order Chebyshev polynomial DEM using mekal. XSpec model. | ||||

xsc6pmekl | models | Exponential of 6th-order Chebyshev polyn. DEM using mekal. XSpec model. | ||||

xsc6pvmkl | models | Variable abundance version of c6pmekl. XSpec model. | ||||

xsc6vmekl | models | Variable abundance version of c6mekl. XSpec model. | ||||

xscabs | models | Compton scattering (non-relativistic). XSpec model. | ||||

xscemekl | models | Multi-temperature mekal. XSpec model. | ||||

xscevmkl | models | Multi-temperature vmeka. XSpec model. | ||||

xscflow | models | Cooling flow model. XSpec model. | ||||

xscompbb | models | Comptonized blackbody spectrum after Nishimura et al. (1986). XSpec model. | ||||

xscompls | models | Comptonization spectrum after Lamb and Sanford (1979). XSpec model. | ||||

xscompps | models | Comptonization, Poutanen and Svenson. XSpec model. | ||||

xscompst | models | Comptonization spectrum after Sunyaev and Titarchuk (1980). XSpec model. | ||||

xscompth | models | Component of Paolo Coppi's hybrid (thermal/non-thermal) hot plasma emission models. | ||||

xscomptt | models | Comptonization spectrum after Titarchuk (1994). XSpec model. | ||||

xsconstant | models | Energy-independent multiplicative factor. XSpec model. | ||||

xscplinear | models | Non-physical piecewise-linear model for low count background spectra. XSpec model. | ||||

xscutoffpl | models | Power law with high energy exponential cutoff. XSpec model. | ||||

xscyclabs | models | Cyclotron absorption line. XSpec model. | ||||

xsdiskbb | models | Multiple blackbody disk model. XSpec model. | ||||

xsdiskir | models | Irradiated inner and outer disk. XSpec model. | ||||

xsdiskline | models | Line emission from relativistic accretion disk. XSpec model. | ||||

xsdiskm | models | Disk model with gas pressure viscosity. XSpec model. | ||||

xsdisko | models | Modified blackbody disk model. XSpec model. | ||||

xsdiskpbb | models | Accretion disk, power-law dependence for T(r). XSpec model. | ||||

xsdiskpn | models | Accretion disk around a black hole. XSpec model. | ||||

xsdisk | models | Disk model. XSpec model. | ||||

xsdust | models | Dust scattering out of the beam. XSpec model. | ||||

xsedge | models | Absorption edge. XSpec model. | ||||

xseplogpar | models | Log-parabolic blazar model with nFn normalization. XSpec model. | ||||

xseqpair | models | Component of Paolo Coppi's hybrid (thermal/non-thermal) hot plasma emission models | ||||

xseqtherm | models | Component of Paolo Coppi's hybrid (thermal/non-thermal) hot plasma emission models | ||||

xsequil | models | Equilibrium ionization collisional plasma model from Borkowski. XSpec model. | ||||

xsexpabs | models | Low-energy exponential cutoff. XSpec model. | ||||

xsexpdec | models | An exponential decay. XSpec model. | ||||

xsexpfac | models | Exponential factor. XSpec model. | ||||

xsezdiskbb | models | Multiple blackbody disk model with zero-torque inner boundary. XSpec model. | ||||

xsgabs | models | A multiplicative gaussian absorption line. XSpec model. | ||||

xsgadem | models | Plasma emission, multi-temperature with gaussian distribution of emission measure. XSpec model. | ||||

xsgaussian | models | Simple gaussian line profile. XSpec model. | ||||

xsgnei | models | Generalized single ionization NEI plasma model. XSpec model. | ||||

xsgrad | models | GR accretion disk around a black hole. XSpec model. | ||||

xsgrbm | models | Gamma-ray burst model. XSpec model. | ||||

xshighecut | models | High energy cutoff. XSpec model. | ||||

xshrefl | models | Simple reflection model good up to 15 keV. XSpec model. | ||||

xskerrbb | models | Multi-temperature blackbody model for thin accretion disk around a Kerr black hole. XSpec model. | ||||

xskerrdisk | models | Accretion disk line emission with BH spin as free parameter. XSpec model. | ||||

xskerrd | models | Optically thick accretion disk around a Kerr black hole. XSpec model. | ||||

xslaor2 | models | Accretion disk with broken-power law emissivity profile, black hole emission line. XSpec model. | ||||

xslaor | models | Line from accretion disk around a black hole. XSpec model. | ||||

xslogpar | models | Log-parabolic blazar model. XSpec model. | ||||

xslorentz | models | Lorentzian line profile. XSpec model. | ||||

xsmekal | models | Mewe-Kaastra-Liedahl thermal plasma (1995). XSpec model. | ||||

xsmeka | models | Mewe-Gronenschild-Kaastra thermal plasma (1992). XSpec model. | ||||

xsmkcflow | models | Cooling flow model based on mekal. XSpec model. | ||||

xsnei | models | Simple nonequilibrium ionization plasma model. XSpec model. | ||||

xsnotch | models | Notch line absorption. XSpec model. | ||||

xsnpshock | models | Plane-parallel shock with ion and electron temperatures. XSpec model. | ||||

xsnsagrav | models | NS H atmosphere model for different g. XSpec model. | ||||

xsnsatmos | models | NS Hydrogen Atmosphere model with electron conduction and self-irradiation. XSpec model. | ||||

xsnsa | models | Spectra in the X-ray range (0.05-10 keV) emitted from a hydrogen atmosphere of a neutron star. XSpec model. | ||||

xsnsmax | models | Neutron Star Magnetic Atmosphere. XSpec model. | ||||

xsnteea | models | Pair plasma model. XSpec model. | ||||

xsnthcomp | models | Thermally comptonized continuum. XSpec model. | ||||

xsoptxagnf | models | Color-temperature-corrected disc and energetically coupled Comptonization model for AGN. XSpec model. | ||||

xsoptxagn | models | Color-temperature-corrected disc and energetically coupled Comptonization model for AGN. XSpec model. | ||||

xspcfabs | models | Partial covering fraction absorption. XSpec model. | ||||

xspegpwrlw | models | Power law with pegged normalization. XSpec model. | ||||

xspexmon | models | Neutral Compton reflection with self-consistent Fe and Ni lines. XSpec model. | ||||

xspexrav | models | Exponentially cutoff power law reflected from neutral matter. XSpec model. | ||||

xspexriv | models | Exponentially cutoff power law reflected from ionized matter. XSpec model. | ||||

xsphabs | models | Photo-electric absorption. XSpec model. | ||||

xsplabs | models | Absorption model with power law dependence on energy. XSpec model. | ||||

xsplcabs | models | Cutoff power law observed through dense, cold matter. XSpec model. | ||||

xsposm | models | Positronium continuum. XSpec model. | ||||

xspowerlaw | models | Simple photon power law. XSpec model. | ||||

xspshock | models | Constant temperature, plane-parallel shock plasma model. XSpec model. | ||||

xspwab | models | An extension of partial covering fraction absorption into a power-law distribution of covering fraction. XSpec model. | ||||

xsraymond | models | Raymond-Smith thermal plasma. XSpec model. | ||||

xsredden | models | IR/optical/UV extinction from Cardelli et al. (1989). XSpec model. | ||||

xsredge | models | Recombination edge. XSpec model. | ||||

xsrefsch | models | E-folded power law reflected from an ionized relativistic disk. XSpec model. | ||||

xssedov | models | Sedov model with electron and ion temperatures. XSpec model. | ||||

xssirf | models | Self-irradiated funnel. XSpec model. | ||||

xssmedge | models | Smoothed absorption edge. XSpec model. | ||||

xsspexpcut | models | Super-exponential cutoff absorption. XSpec model. | ||||

xsspline | models | Spline multiplicative factor. XSpec model. | ||||

xssrcut | models | Synchrotron radiation from cutoff electron distribution. XSpec model. | ||||

xssresc | models | Synchrotron radiation from escape-limited electron distribution. XSpec model. | ||||

xssss_ice | models | Einstein SSS ice absorption. XSpec model. | ||||

xsstep | models | Step function convolved with gaussian. XSpec model. | ||||

xsswind1 | models | Absorption by partially ionized material with large velocity shear. XSpec model. | ||||

xstbabs | models | Calculates the absorption of X-rays by the ISM. XSpec model. | ||||

xstbgrain | models | Calculates the absorption of X-rays by the ISM with variable hydrogen to H2 ratio and grain parameters. XSpec model. | ||||

xstbvarabs | models | Calculates the absorption of X-rays by the ISM, allowing user to vary all abundances, depletion factors, and grain properties. XSpec model. | ||||

xsuvred | models | UV reddening. XSpec model. | ||||

xsvapec | models | APEC thermal plasma model with variable abundances. XSpec model. | ||||

xsvarabs | models | Photoelectric absorption with variable abundances. XSpec model. | ||||

xsvbremss | models | Thermal bremsstrahlung spectrum with variable H/He. XSpec model. | ||||

xsvequil | models | Ionization equilibrium collisional plasma model with variable abundances. XSpec model. | ||||

xsvgadem | models | Plasma emission, multi-temperature with gaussian distribution of emission measure. XSpec model. | ||||

xsvgnei | models | Non-equilibrium ionization collisional plasma model with variable abundances. XSpec model. | ||||

xsvmcflow | models | Cooling flow model based on vmekal. XSpec model. | ||||

xsvmekal | models | M-K-L thermal plasma with variable abundances. XSpec model. | ||||

xsvmeka | models | M-G-K thermal plasma with variable abundances. XSpec model. | ||||

xsvnei | models | Non-equilibrium ionization collisional plasma model with variable abundances. XSpec model. | ||||

xsvnpshock | models | Plane-parallel shock plasma model with separate ion and electron temperatures and variable abundances. XSpec model. | ||||

xsvphabs | models | Photoelectric absorption with variable abundances. XSpec model. | ||||

xsvpshock | models | Constant temperature, plane-parallel shock plasma model with variable abundances. XSpec model. | ||||

xsvraymond | models | Raymond-Smith thermal plasma with variable abundances. XSpec model. | ||||

xsvsedov | models | Sedov model with separate ion and electron temperatures and variable abundances. XSpec model. | ||||

xsvvapec | models | APEC thermal plasma model with variable abundances. XSpec model. | ||||

xswabs | models | Photoelectric absorption (Morrison and McCammon). XSpec model. | ||||

xswndabs | models | Photoelectric absorption with low energy window. XSpec model. | ||||

xsxion | models | Reflected spectra of a photo-ionized accretion disk or ring. XSpec model. | ||||

xszbbody | models | Redshifted blackbody. XSpec model. | ||||

xszbremss | models | Redshifted thermal bremsstrahlung. XSpec model. | ||||

xszdust | models | Extinction by dust grains. XSpec model. | ||||

xszedge | models | Redshifted absorption edge. XSpec model. | ||||

xszgauss | models | Redshifted gaussian. XSpec model. | ||||

xszhighect | models | Redshifted high energy cutoff. XSpec model. | ||||

xszigm | models | UV/Optical attenuation by the intergalactic medium. | ||||

xszpcfabs | models | Redshifted partial covering absorption. XSpec model. | ||||

xszphabs | models | Redshifted photoelectric absorption. XSpec model. | ||||

xszpowerlw | models | Redshifted power law. XSpec model. | ||||

xszredden | models | Redshifted version of redden. XSpec model. | ||||

xszsmdust | models | Extinction by dust grains in starburst galaxies. XSpec model. | ||||

xsztbabs | models | Calculates the absorption of X-rays by the ISM for modeling redshifted absorption. Does not include a dust component. XSpec model. | ||||

xszvarabs | models | Redshifted photoelectric absorption with variable abundances. XSpec model. | ||||

xszvfeabs | models | Redshifted absorption with variable iron abundance. XSpec model. | ||||

xszvphabs | models | Redshifted photoelectric absorption with variable abundances. XSpec model. | ||||

xszwabs | models | Redshifted "Wisconsin absorption." XSpec model. | ||||

xszwndabs | models | Redshifted photoelectric absorption with low energy window. XSpec model. | ||||

xszxipcf | models | Partial covering absorption by partially ionized material. XSpec model. | ||||

xs | models | XSpec model functions. |