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xy2sky(1) [debian man page]

xy2sky(1)						      General Commands Manual							 xy2sky(1)

Name
       xy2sky - Compute RA Dec from X Y using WCS in FITS and IRAF image files

Synopsis
       xy2sky [-vbjg] [-n ndec] file.fts x1 y1 ... xn yn
       or
       xy2sky [-bdjgv] [-n ndec] file.fts @listfile

Description
       xy2sky  (pronounced X-Y-to-sky) is a utility for getting the world coordinates of a set of image 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 coordinate (X,Y) pairs to right ascension and declination sky coordinate
       pairs. The current version of the program prints the coordinates at the same equinox 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.

Options
       -a     Append input line after output position

       -b     B1950 (FK4) output

       -d     RA and Dec output in degrees

       -e     Output in ecliptic longitude and latitude in degrees.

       -f <number>
	      Set third dimension for 3-D projections such as CSC

       -g     Galactic longitude and latitude output

       -i     First column is star id; 2nd, 3rd are x,y position

       -j     J2000 (FK5) output

       -m <number>
	      Set mode for output of LINEAR WCS coordinates:  0: x y linear 1: x units y units 2: x y linear units units

       -n <number>
	      Number of decimal places in output RA seconds

       -q <year>
	      Output equinox if not 2000 (-j) or 1950 (-b)

       -t     Output as tab-separated table

       -v     More descriptive output -z Use AIPS classic projections instead of WCSLIB

See Also
       sky2xy(1)

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

6 July 2001							     WCSTools								 xy2sky(1)

Check Out this Related Man Page

skycoor(1)						      General Commands Manual							skycoor(1)

Name
       skycoor - Convert coordinates

Synopsis
       skycoor [-bdgjv] [-n ndec] ra1 dec1 sys1 ... ran decn sysn
       or
       skycoor [-vbjg] [-n ndec] @listfile

Description
       skycoor	converts  coordinates  between the J2000, B1950, and galactic coordinate systems, rounding to a specified number of decimal places
       and printing in degrees or hh:mm:ss.sss dd:mm:ss.sss.  Input coordinates may also be in either format, and the system (J2000, B1950, or ga-
       lactic) may be in upper or lower case.  No spaces are allowed within  the individual coordinates

Options
       -b     B1950 (FK4) output

       -d     RA and Dec output in degrees

       -e     Ecliptic longitude and latitude output

       -g     Galactic longitude and latitude output

       -i r|d|
	      Input units (r=radians, d=degrees, else hh:mm:sss dd:mm:sss)

       -j     J2000 (FK5) output

       -n <num>
	      Number of decimal places in output RA seconds

       -o <num>
	      Offset coordinates by this many arcseconds

       -p     RA and Dec proper motion in milliarcseconds/year

       -q     Output system, including equinox

       -r <RA> <Dec> <RA> <Dec>
	      Angular separation between two RA, Dec pairs

       -s     Output ra= dec= epoch= radecsys= for sethead

       -v     Print more intermediate information

       -w     Convert RA, Dec equatorial coordinates to x,y,z

       -x     Convert x,y,z equatorial coordinates to RA, Dec

       -y <epoch>
	      Epoch of coordinates in years

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

9 November 2001 						     WCSTools								skycoor(1)
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