These files run the tasks of the RVSAO package from the Unix/Linux
command line as if you were inside IRAF.  The parameters used come
from the IRAF home directory defined by the irafhome environment
variable or if that is not present, the IRAF/ subdirectory of the
user's home directory.

bcvcorr    Compute barycentric velocity correction for a spectrum
contpars   Set continuum fitting parameters for xcsao and emsao
contsum    Set continuum fitting parameters for sumspec
emsao      Find velocities (red shifts) of emission lines in a spectrum
emplot     Plot a spectrum labelling emission and absorption lines
eqwidth    Find equivalent widths of emission and absorption lines in a spectrum
ihelp      Print help file of an IRAF task
irafhelp   Print help file of an IRAF task
linespec   Make an emission line template spectrum given a line list
listspec   List the spectrum in the specified format
sumspec    Add spectra, shift them, and/or remove continua
xcsao      Cross-correlate a spectrum against a set of templates

If you type the command with no arguments
you will get a simple help message with options for parameter access
and more complete help, for example

> xcsao
XCSAO: Cross-correlate a spectrum against a set of templates
usage: xcsao spectrum [templates=xxx][other arguments]
       xcsao help  for IRAF help
       xcsao dpar  to dump parameters
       xcsao epar  to edit parameters
       xcsao lpar  to list parameters

where
<task> dpar dumps the parameters using IRAF's dpar as task.parameter=value
<task> epar edits the parameters using IRAF's eparam
<task> help opens IRAF help for the task
<task> lpar list the parameters using IRAF's lparam
