Summary of Commands

Change the fit statistic in use.

abund	Set the Solar abundance table.
addcomp	Add a component to the model.
arf	Read an auxiliary response file.
autosave	Periodically save the XSPEC status.
backgrnd	Reset the files to be used for background subtraction.
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 and q0.
cpd	Alias for setplot device.
data	Input one or more PHA data files.
delcomp	Delete a component from the model.
diagrsp	Diagonalise 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.
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.
gain	Perform a simple modification of the response gain.
goodness	Monte Carlo calculation of goodness-of-fit for C-statistic.
hardcopy	Spool the current plot to the printer.
help	Obtain help on XSPEC commands.
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.
method	Set the minimization method.
model	Define the model to be used when fitting the data.
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
steppar	Step through a range of parameter values; perform a fit 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.
thaw	Allow a model parameter to vary during the fit.
thleqw
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.

Exceptional responses to the command prompt are :

an empty line	Nothing performed, prompt repeated.
/	Any remaining arguments will have the values given on the last invocation of the command.
<EOF>	same as quit. Under VAX/VMS this is <CTRL-Z>, otherwise use / .
? (or anything else)	Write a list of the commands.