NAME
alignasn -- Change the relative shifts in association file
USAGE
alignasn association
PARAMETERS
- asn_dir
-
calnicb style association file with list of images to be aligned. This
image should be a list of direct images.
- asn_grism
-
calnicb style association file with list of images to be aligned. This
image should be a list of grism images with a one-to-one correspondence to the list
of direct images.
DESCRIPTION
Interactive program to compute relative shifts of images in an association file.
The user interactively marks the stars on one direct image. The program first
computes approximate shifts from the wcs, and then measures the coordinates of
the stars using imcnt. After computing the relative shifts of the direct images,
alignasn searches for corresponding grism images for each of the direct images.
Corresponding images are those with exactly the same wcs coordinates in the
header. The grism association is then updated with the same relative shift
measurements as determined from the direct images.
EXAMPLES
TIME REQUIREMENTS
BUGS
SEE ALSO