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zvel



.help zvel Mar94 rvsao
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NAME
zvel -- Compute redshift using the cross-correlation and emission line techniques
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USAGE
zvel spectra
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PARAMETERS
.ls imagelist = ""
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.
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.ls imagext=".imh"
Image header file name extension
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.ls emis_vel=yes
Compute emission line velocities (yes or no)
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.ls corr_vel=yes
Compute cross correlation velocities (yes or no)
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.ls plot=yes
Plot results on display (yes or no)
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.ls hard_copy=no
Make printer hard copies (yes or no)
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.ls curmode = no
If yes, wait in cursor mode after each spectrum is processed.  Cursor
mode commands may be listed by typing "?".
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.ls verbose = no
If yes, values of the parameters fit to the selected peak
are recorded in the log files.  This is most useful for debugging.
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DESCRIPTION
ZVEL runs either XCSAO or EMSAO or both, so the user doesn't have to
type a file name in twice.  Set parameters in XCSAO, EMSAO, and CONTPARS.
curmode, hard_copy, plot, and verbose 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.

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EXAMPLES
To obtain the redshift and dispersion of a single galaxy

        cl> zvel galaxy

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

        cl> zvel @nite1.ls

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BUGS
.endhelp

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