makeprfcorr -- Compute the pixel response function for an image created with asncombine
calnicb style association file with list of images to be aligned.
resolution parameter used to combine images (see help for asncombine).
amplitude for pixel response function in a single image in percent.
plotting device to plot resulting pixel response function. If left blank, no
plot will be created.
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.