WCSTools Programs which use the
USNO A-1.0, A-2.0, and SA-1.0, SA-2.0 Catalogs

These programs are part of the WCSTools software package, a self-contained package of programs and libraries for accessing catalogs and images and using them together in interesting ways. It is written in very portable C code, and sources are available here.

Catalog Search Programs

sua1
Search the U.S. Naval Observatory A-1.0 Catalog (UA1) given a search center and a radius, with optional magnitude limits. (link to scat)
sua2
Search the U.S. Naval Observatory A-2.0 Catalog (UA2) given a search center and a radius, with optional magnitude limits. (link to scat)
susa1
Search the U.S. Naval Observatory SA-1.0 Catalog (UAC) given a search center and a radius, with optional magnitude limits. (link to scat)
susa2
Search the U.S. Naval Observatory SA-2.0 Catalog (UAC) given a search center and a radius, with optional magnitude limits. (link to scat)
scat
Search the GSC, USAC, UAC, UJC, or a local catalog given a search center and a radius, with optional magnitude limits.

Using an Image World Coordinate System

imua1
Find and list the USNO A-1.0 Catalog Stars in an IRAF or FITS image, with their pixel coordinates, if there is WCS information in the image header. (link to imcat)
imua2
Find and list the USNO A-2.0 Catalog Stars in an IRAF or FITS image, with their pixel coordinates, if there is WCS information in the image header. (link to imcat)
imusa1
Find and list the USNO SA-1.0 Catalog Stars in an IRAF or FITS image, with their pixel coordinates, if there is WCS information in the image header. (link to imcat)
imusa2
Find and list the USNO SA-2.0 Catalog Stars in an IRAF or FITS image, with their pixel coordinates, if there is WCS information in the image header. (link to imcat)
imcat
Find and list the HST Guide Star Catalog, the USNO A Catalogs, the USNO SA Catalogs, USNO UJ Catalog, or user-catalogued stars in an IRAF or FITS image, with their pixel coordinates if there is WCS information in the image header.

Setting an Image World Coordinate System

imwcs
Automatically find stars in a FITS or IRAF image, match them to HST Guide Stars, USNO A Catalog stars, USNO SA Catalog stars, USNO UJ Catalog stars, or a locally-assembled reference catalog, compute the relation between sky coordinates and image coordinates, and write the resulting world coordinate system keywords into the header of a copy of the original image.
immatch
Automatically find stars in a FITS or IRAF image and match them to HST Guide Stars, USNO A Catalog stars, USNO SA Catalog stars, USNO UJ Catalog stars, or a locally-assembled reference catalog based on the relation between sky coordinates and image coordinates given by the world coordinate system keywords in the header of the image.

Last updated 28 November 2000 by Doug Mink

Telescope Data Center [WCSTools] [USNO catalogs]