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

       Jessica Mink, SAO (jmink@cfa.harvard.edu)

14 April 1998                                       WCSTools                                            imgsc(1)

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

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

-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[<brightmagnitude>]<faintmagnitude>
              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 polynomial solution.

       imcat(),imuac(),imusac(),scat()

       imgsc [options] FITS or IRAF file(s)