xenial (1) sky2xy.1.gz

Name

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

Synopsis

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

Description

       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.

Options

       -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

See Also

       xy2sky()

Author

       Doug Mink, SAO (dmink@cfa.harvard.edu)