File: pvel.hlp

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.help pvel Jul2010 rvsao
.ih
NAME
pvel -- Compute redshift using the cross-correlation and emission line techniques
.ih
USAGE
pvel spectra
.ih
PARAMETERS
.ls spectra = ""
List of file names of spectra to analyze.
@<filename> indicates list should come from file <filename>.
<filename>[<range>] indicates that a range of apertures in a multispec
file should be processed, where <range> is a comma- and/or
hyphen-separated list of numbers.
.le
.ls nskip = 0
Number of files in list to skip
.le
.ls ap1 = 1
First spectrum aperture to process
.le
.ls ap2 = 1
Last spectrum aperture to process
.le
.ls specband = 0
Spectrum band if multispec file
.ls specext = 0
FITS extension for spectra (0 if only primary header)"}
.le
.ls specdir = ""
Directory from which to read spectra
.le
.ls templates = ""
List of template spectra
.le
.ls tempdir = ""
Directory for template spectra
.le
.ls corr_vel = yes
Compute cross correlation velocities (yes or no)
.le
.ls emis_vel = no
Compute emission line velocities (yes or no)
.le
.ls plot = no
Plot results on display (yes or no)
.le
.ls hard_copy = no
Make printer hard copies (yes or no)
.le
.ls curmode = no
If yes, wait in cursor mode after each spectrum is processed.  Cursor
mode commands may be listed by typing "?".
.le
.ls verbose = no
Print what's happening (yes or no)
.le
.ls debug = no
Print everything that happens in pxcsao and/or pemsao (yes or no)
.le
 
.ih
DESCRIPTION
PVEL runs either PXCSAO or PEMSAO or both, so the user doesn't have to
type a file name in twice.  Set parameters in PXCSAO, PEMSAO, and CONTPARS.
ap1 and ap2 override specnum.  specext, specband, specdir, templates,
 tempdir, curmode, hard_copy, plot, and debug override the equivalent
parameters in XCSAO and EMSAO.  If both XCSAO and EMSAO are being run, the
image files should be writeable so the cross-correlation velocity can be saved
to be used as an initial guess at the emission line velocity.

.ih
EXAMPLES
To obtain the redshift and dispersion of a single galaxy

        cl> pvel galaxy

To obtain redshifts for a whole night's worth of galaxy spectra:

        cl> pvel @nite1.ls

.ih
BUGS
.endhelp