sky2xy - Compute X Y from RA Dec using WCS in FITS and IRAF image files

       Jessica Mink, SAO (jmink@cfa.harvard.edu)

6 July 2001                                         WCSTools                                           sky2xy(1)

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, ecliptic or galactic
       coordinates. Input and output files in the Starbase format will eventually be allowed.

       sky2xy - Compute X Y from RA Dec using WCS in FITS and IRAF image files

-b     B1950 (FK4) input

       -e     Ecliptic longitude and latitude input

       -g     Galactic longitude and latitude input

       -j     J2000 (FK5) input

       -g     Galactic longitude and latitude input

       -v     More descriptive output

       -z     Use AIPS classic projections instead of WCSLIB

       xy2sky()

       sky2xy [-vbjg] file.fts ra1 dec1 ... ran decn
       or
       sky2xy [-vbjg] file.fts @listfile