sn_fidmatch
sn_fidmatch
tries to determine the position offset and the
magnitude difference between the target and the reference images
by comparing the locations and brightness of the fiducial stars.
sn_fidmatch
takes as its argumment the DATID of the
target galaxy image and
looks at the list of star positions found in the target
image by
sn_finder and uses
findmatch
to determine the offset
(in rows and columns).
It then determines the median brightness difference
between the matching stars in the two images.
It writes the
keywords
values into a .match file.
- NMATCH - the number of fiducial stars common to the two images;
this number must be two or greater
- DR - the difference between the row positions of stars
in the target-reference images
- DC - the difference between the column position of stars
in the target-reference images
- MAGDIFF - the median magnitude of target-reference
.match file.
The lines after the END statement contain the
" # row col mag_tar mag_ref tar-ref
Last Updated 4/04/97 -RRT