sky2xy (pronounced sky-to-X-Y) is a utility for getting the image
coordinates of a set of world coordinates in a FITS or IRAF image.
World coordinate system (WCS) information in the image header describes,
in a standard way, the relationship between sky coordinates and image pixels.
This information is used by the program to transform image right ascension
and declination sky coordinate pairs to image coordinate (X,Y) pairs.
The program prints the coordinates at the same system as is given in the
image header, but future versions will allow transformations to B1950/FK4,
J2000/FK5, or galactic coordinates. Input and output files in the
Starbase format will eventually be allowed.
from Sky Coordinates
The inverse program,
xy2sky, computes world coordinates
from image pixel coordinates.
Command Line Arguments
Last updated 10 November 2009 by