ifu-image reconstructs a direct image of the field of the two ifu bundles,
from a set of ifu image files. The image of the object and field ifus are
stored in a 2-d fits file, the object image as the primary HDU, and the
field image as the first fits extension HDU
USAGE
ifu-image framename
INPUT
framename is a set
of ifu direct image files
OUTPUT
framename_ifu.fits
PARAMETERS
FLAT_FILE
name of flat field file to be used, or
'none'
OBSDEF
observation definition file for ifu image
Details:
If a flat-field file is specified in the parameter file, it will be used.
This file must itself be an _ifu file, produced by ifu-image (with FLAT_FILE
set to 'none') from a direct ifu flat-field exposure.
ifu-image requires 1x1 binning. It also requires either a full 2048x4096
frame, or a subraster with x width of 2048 and a y range extending to the
top of the chip, i.e. x: 1 - 2048 y: n - 4096.
Because the individual fiber spots at the IFU output are small, good
alignment is important to correctly reconstruct the image. If in any doubt,
adjust the dewar offset file before running. The alignment of the image produced
by ifu-image on the sky is TBD.