1sky2xy(1)                   General Commands Manual                  sky2xy(1)
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Name

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

9       sky2xy [-vbjg] file.fts ra1 dec1 ... ran decn
10       or
11       sky2xy [-vbjg] file.fts @listfile
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Description

14       sky2xy (pronounced sky-to-X-Y) is a utility for getting the image coor‐
15       dinates of a set of world coordinates in a FITS or  IRAF  image.  World
16       coordinate system (WCS) information in the image header describes, in a
17       standard way, the relationship between sky coordinates and  image  pix‐
18       els.  This  information is used by the program to transform image right
19       ascension and declination sky  coordinate  pairs  to  image  coordinate
20       (X,Y)  pairs.  The program prints the coordinates at the same system as
21       is given in the image header, but future versions will allow  transfor‐
22       mations  to  B1950/FK4,  J2000/FK5,  ecliptic  or galactic coordinates.
23       Input and output files  in  the  Starbase  format  will  eventually  be
24       allowed.
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Options

27       -b     B1950 (FK4) input
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29       -e     Ecliptic longitude and latitude input
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31       -g     Galactic longitude and latitude input
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33       -j     J2000 (FK5) input
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35       -g     Galactic longitude and latitude input
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37       -v     More descriptive output
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39       -z     Use AIPS classic projections instead of WCSLIB
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See Also

43       xy2sky()
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Author

47       Jessica Mink, SAO (jmink@cfa.harvard.edu)
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516 July 2001                        WCSTools                          sky2xy(1)