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sua2(1) 						      General Commands Manual							   sua2(1)

       sua2 - Find USNO-A2.0 Catalog stars in a square on the sky

       sua2 [options] ra dec system

       suac finds all of the U.S. Naval Observatory A2.0 Catalog objects in a specified region of the sky and lists their sky positions and magni-
       tudes in order of brightness. Output is to standard out, unless the -w flag is set, in which case it goes to objectname.uac or  search.uac.
       It is a link to scat.

       -a  list single closest catalog source -b Output B1950 (FK4) coordinates -d Sort by distance from center instead of flux -e Output ecliptic
       coordinates -f Output search center for other programs -g Output galactic coordinates -h Print heading, else do not -i Print catalog object
       name,  not  catalog  number (=ua2_region_number) -j Output J2000 (FK5) coordinates -l Print center and closest star on one line -m [<bright
       magnitude>] <faint magnitude> Limiting catalog magnitude(s) (default none, bright -2 if only faint is given) -n <num> Number  of  brightest
       stars  to  print  -o  <name>  Object  name used to name output file -p Sort by distance from search center instead of brightness -q <years>
       Equinox of output positions in years -r <radius> Search box half-width in arcsec or dd:mm:ss If negative, this is a radius; if two numbers,
       first  is  in  right ascension, second is in declination. (default is 10, that is a 20x20 arcsec box) -s Sort by right ascension instead of
       flux -t Tab table output -u <num> Print X Y instead of number in front of non-tab entry	-v  Verbose  listing  of  processing  intermediate
       results -w Write tab table output file imagename.uac -y Epoch of output positions in years

See Also
       scat(1), susac(1), imuac(1), sgsc(1)

       Doug Mink, SAO (

19 November 1999							WCS								   sua2(1)

Check Out this Related Man Page

wcstools(1)						      General Commands Manual						       wcstools(1)

       wcstools - Programs to access image world coordinate systems and catalogs

Setting an Image World Coordinate System
       imwcs  Automatically  find stars in a FITS or IRAF image, match them to HST Guide USNO A or USNO UJ Stars, compute the relation between sky
	      coordinates and image coordinates, and write in in the image header. [after U of Iowa SETWCS]

       delwcs Delete the WCS keywords from an image. If both EPOCH and EQUINOX are present, EQUINOX is also deleted.

Using an Image World Coordinate System
       imcat  List catalog sources which should be found in the area of the sky covered by a specific image.

       imsize Print center and size of image using WCS keywords in header

       imstar Find and list the n brightest stars in an IRAF or FITS image, with their sky coordinates if there is WCS information  in	the  image

       sky2xy Print image pixel coordinates for given sky coordinates on the command line or in a list file.

       xy2sky Print sky coordinates for given image pixel coordinates on the command line or in a list file.

Catalog Utility Programs
       scat   Search the HST GSC, USNO-A2.0, or other catalog given a region on the sky.

	      Convert between J2000, B1950, and Galactic coordinates from the command line or a file.

Image Utility Programs
       addpix Add a constant value(s) to specified pixel(s)

       edhead Edit the header of a FITS file or the user parameters of an IRAF image file using a the text editor specified by the EDITOR environ-
	      ment variable.

	      Return values for keyword(s) specified after filename.

       getpix Return value(s) of specified pixel(s)

       i2f    Read two-dimensional IRAF image file and write FITS image file

       imhead Print FITS or IRAF header

       imrot  Rotate and/or reflect FITS or IRAF image files

       setpix Set specified pixel(s) to specified value(s)

	      Set header parameters in FITS or IRAF images.

       subpix Subtract a constant value(s) from specified pixel(s)

       Doug Mink, SAO (

6 July 2001							     WCSTools							       wcstools(1)
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