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.help mkspec Mar92 noao.onedspec
.ih
NAME
mkspec -- generate an artificial spectrum or image (obsolete)
.ih
USAGE
mkspec image_name image_title ncols nlines function
.ih
PARAMETERS
.ls image_name
The name to be given to the image file
.le
.ls image_title
A character string to be used to describe the image
.le
.ls ncols
The number of pixels in the spectrum (the length of the image).
.le
.ls nlines
The number or lines (rows) in the image.
.le
.ls function
An indicator specifying the form of the spectrum: 1 - a constant,
2 - a ramp running from start_level to end_level, 3 - a black body
extending in wavelength (Angstroms) from start_wave to end_wave
at a given temperature (in degrees K).
.le
.ls constant
The value to be assigned to the spectrum if function=1 (constant).
.le
.ls start_level
The starting value to be assigned to the spectrum at pixel 1 if
function=2 (ramp).
.le
.ls end_level
The ending value of the spectrum assigned at pixel=ncols if function=2.
.le
.ls start_wave
The wavelength (Angstroms) assigned to pixel 1 if function=3 (Black Body).
.le
.ls end_wave
The wavelength (Angstroms) assigned to the last pixel if function=3.
.le
.ls temperature
The black body temperature (degrees K) for which the spectrum
is to be created if function=3.
.le
.ih
DESCRIPTION
An artificial image is created with the specified name and length.
The image may have a constant value (function=1), or may be a ramp
with either positive or negative slope (function=2), or may be
a black body curve (function=3).
Only those parameters specific to the functional form of the image
need be specified. In all cases the parameters image_name, image_title,
ncols, nlines, and function are required. If function=1, parameter constant
is required; if function=2, start_level and end_level are required;
if function=3, start_wave, end_wave, and temperature are required.
All black body functions are normalized to 1.0 at their peak
intensity which may occur at a wavelength beyond the extent of
the generated spectrum.
NOTE THAT THIS TASK IS OBSOLETE AND ARTDATA.MK1DSPEC SHOULD BE USED.
In particular this task does not set the header dispersion coordinate
system.
.ih
EXAMPLES
.nf
cl> mkspec allones "Spectrum of 1.0" 1024 1 1 constant=1.0
cl> mkspec ramp "From 100.0 to 0.0" 1024 64 2 start=100 \
>>> end=0.0
cl> mkspec bb5000 "5000 deg black body" 512 1 3 start=3000 \
>>> end=8000 temp=5000
.fi
.ih
REVISIONS
.ls MKSPEC V2.10
This task is unchanged.
.le
.ih
SEE ALSO
artdata.mk1dspec, artdata.mk2dspec, artdata.mkechelle
.endhelp
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