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Summary of Commands




abund
Set the abundance table.
addcomp
Add a component to the model.
addline
Add lines to a model (Tcl script).
arf
Read an auxiliary response file.
autosave
Periodically save the XSPEC status.
backgrnd
Reset the files to be used for background subtraction.
bayes
Set up for Bayesian inference
chain
Run a Monte Carlo Markov Chain.
chatter
Control the verbosity of XSPEC.
corfile
Reset the files to be used for background correction.
cornorm
Reset the normalization to be used in correcting the background.
cosmo
Set H0, q0, and Lambda0.
cpd
Alias for setplot device.
data
Input one or more PHA data files.
delcomp
Delete a component from the model.
diagrsp
Diagonalize the current response for an ideal response.
dummyrsp
Create a 'dummy' response, covering a given energy range.
dump
Write out history packages of the observed spectrum and model.
editmod
Add, delete, or replace one component in the model.
eqwidth
Calculate a model component's equivalent width.
error
Determine a single parameter confidence region.
exec
Execute a shell command from within XSPEC.
exit
Wind up any hardcopy plots and exit from XSPEC.
extend
Extend the energy range over which the model is calculated.
fakeit
Produce simulated data files for sensitivity studies.
fit
Find the best fit model parameters.
flux
Calculate the current model's flux over an energy range.
freeze
Do not allow a model parameter to vary during the fit.
ftest
Calculate the F-statistic between two model fits
gain
Perform a simple modification of the response gain.
genetic
Set parameters for genetic fitting method.
goodness
Monte Carlo calculation of goodness-of-fit.
hardcopy
Spool the current plot to the printer.
help
Obtain help on XSPEC commands.
identify
List possible lines in the specified energy range.
ignore
Ignore a range of PHA channels in future fit operations.
improve
Try to find a better minimum (requires MINUIT).
iplot
As plot command but interactive using PLT.
log
Open the log file to save output.
lumin
Calculate the current model's luminosity over a given rest frame energy range and redshift.
mdefine
Create a new model component defined by an algebraic expression.
method
Set the minimization method.
model
Define the model to be used when fitting the data.
modid
Guess line IDs in the model (Tcl script).
newpar
Modify the model parameters.
notice
Restore a range of PHA channels for future operations.
plot
Plot various information on the current plot device.
query
Switch on/off prompt to continue fitting.
quit
An alias for exit.
readline
Enable/disable the gnu readline facility.
recornrm
Adjust correction norms to minimize the fit statistic, holding the model fixed.
renorm
Adjust the model norms, and/or allow automatic renorming.
response
Reset the files used to determine the detector responses.
save
Save aspects of the current state to a command file.
script
Open the script file to save all commands input.
setplot
Modify the plot device and other values used by the plot routines.
show
Display current file and model information.
source
Execute a script file.
statistic
Change the fit statistic in use.
steppar
Step through a range of parameter values; perform a fit at each step.
suggest
Make a suggestion or report a bug to the XSPEC gnomes.
syscall
Run a shell command.
systematic
Set the model systematic error.
tclout
write xspec data to tcl variable $xspec_tclout
thaw
Allow a model parameter to vary during the fit.
thleqw
Calculates expected fluorescent line equivalent width.
time
Display elapsed time and other statistical information.
uncertain
Alias for error.
untie
Untie linked parameters.
weight
Change the weighting function used for chi-squared fits.
xhistory
Open a history file, in order to save fit results.
xsect
Change the photoelectric absorption cross-sections in use.
xset
Modify a number of XSPEC internal switches


next up [*] [*]
Next: Description of Syntax Up: XSPEC commands Previous: XSPEC commands
Ben Dorman
2003-11-28