File: skyplot.hlp

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.help skyplot July2008 rvsao
.ih
NAME
skyplot -- Use XCSAO to plot sky emission over a sky spectrum
.ih
USAGE
skyplot spectra
.ih
PARAMETERS

.ls spectra = ""
List of file names of spectra to plot
.le
.ls specband = 3
Spectrum band to plot. The sky is in band 3 in IRAF multispec files
from the FAST and Hectospec spectrographs.
.le
.ls specnum = ""
Spectrum aperture range to plot
.le
.ls specdir = ""
Directory for spectrum to plot
.le
.ls skylines = "mmtsky.dat"
File of emission lines to label.  Other good files in the same
directory include mhosky1.dat and mhoskyall.dat, which have more
emission lines, and skylines.dat, which has fewer.
.le
.ls linedir = "rvsao$lib/"
Directory for lines to label
.le
 
.ih
DESCRIPTION
SKYPLOT runs EMSAO and displays the spectrum with night sky emission
lines labelled.  Type "q" to go on to the next spectrum in a list.
Type "?" or space to get a menu of cursor commands.

.ih
CURSOR COMMANDS
.nf
 a  Set redshift guess from absorption line
 b  Set blue limit of line search
 c  Change continuum parameters
 d  Delete data between 1st and 2nd positions
 e  Set redshift guess from emission line
 f  Refit redshift
 g  Number of times to smooth plotted spectrum
 h  Toggle print of heading with filename and redshift
 i  Change initial velocity for search
 j  Conditional velocity
 k  Plot continuum-subtracted spectrum
 l  Line search parameters
 m  Number of times to smooth fit spectrum
 n  Disapprove velocity
 o  Turn line labelling on and off
 p  Replot current graph
 q  Leave plot
 r  Set red limit of line search
 s  Set VELOCITY to a specific value
 t  Switch template for correlation velocity
 u  Unzoom
 v  Plot at e>mission x>correlation c>ombined velocity
 w  Show rest and observed wavelengths
 x  Plot correlation if available or exit
 y  Approve velocity
 z  Zoom between 1st and 2nd positions
 .  Cancel delete or zoom
 /  Toggle plot between full screen and lines
 +  Add emission line to fit
 -  Subtract emission line from fit
 (  Plot previous aperture or order
 >  Plot next aperture or order
 @  Make hard copy of screen
 ?  Display this menu
.fi

.ih
EXAMPLES
To check the skylines in a spectrum,

        cl> skyplot galaxy.ms.fits

To check sky spectra for a whole night's worth of spectra:

        cl> skyplot @nite1.ls

.ih
BUGS
.endhelp