imgsc(1)						      General Commands Manual							  imgsc(1)

Name
       imgsc - Find HST GSC stars in FITS or IRAF image files

Synopsis
       imgsc [options] FITS or IRAF file(s)

Description
       Search  the  HST  Guide Star Catalog withing the area described by the world coordinate system in an image header.  This is a link to imcat
       rather than a separate executable.

Options
       -b [<RA> <Dec>]
	      Output in B1950, optional new image center in B1950 (FK4) RA and Dec

       -c <name>
	      Reference catalog (gsc, ujc, or tab table file

       -g <class>
	      Guide Star Catalog class (-1=all,0,3 (default -1)

       -h     Print heading, else do not

       -j [<RA> <Dec>]
	      Output in J2000, optional new image center in J2000 (FK5) RA and Dec

       -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

       -p <scale>
	      Initial plate scale in arcsec per pixel (default 0)

       -s     Sort by RA instead of flux

       -t     Tab table to standard output as well as file

       -v     Verbose listing of processing intermediate results

       -w     Write tab table output file imagename.cat -z Use AIPS classic projections instead of WCSLIB; use CD matrix or CDELT instead of poly-
	      nomial solution.

See Also
       imcat(),imuac(),imusac(),scat()

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

14 April 1998								WCS								  imgsc(1)