Summary of Commands

abund         - Set the Solar abundance table.

addcomp       - Add a component to the model.

alias         - Create an alias for a command string.

arf           - Read an auxiliary response file.

backgrnd      - Reset the files to be used for background subtraction.

buffer        - Enable/disable/list the command buffer.

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

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

dummyrsp      - Create a 'dummy' response, covering a given energy range

dump          - Write out history packages  of the observed spectrum

eqwidth       - Calculate a model component's equivalent width.

error         - Determine a single parameter confidence region.

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      - Make a hardcopy plot and spool to the printer.
 
help          - Obtain help on XSPEC commands.

history       - Open a history file, in order to save fit results.

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.

pause         - Exit via the FORTRAN PAUSE statement.

plot          - Plot various information on the current plot device.

prompt        - Change the command prompt.

query         - Switch on/off prompt to continue fitting.

quit          - An alias for exit.

recall        - Recall an old command.

recornrm      - Adjust correction norms to minimize the fit statistic,
		holding the model fixed.

reexecute     - Reexecute previous commands.

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.

setplot       - Modify the plot device and other values used by the
		plot routines.

script        - Open the script file to save all commands input.

show          - Display current file and model information.

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.

systematic    - Set the model systematic error.

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.