sgsc(1) 						      General Commands Manual							   sgsc(1)

Name
       sgsc - Find HST GSC stars in a square on the sky

Synopsis
       sgsc [options] [-b or -j] ra dec

Description
       sgsc  is  a  utility  for finding all of the Hubble Space Telescope Guide Star Catalog objects in a specified region of the sky and listing
       them with their sky positions and magnitudes in order of brightness, with the brighter ones first.  Output is to standard out,  unless  the
       -w flag is set, in which case it goes to objectname.gsc or search.gsc. It is somewhat similar to RGSC, which can search from lists of coor-
       dinates but cannot sort the output.  It is a link to scat.

Options
       -a     List single closest catalog source

       -b <RA> <Dec>
	      Output B1950 (FK4) coordinates

       -d     Sort by distance from center instead of flux

       -g <class>
	      Object class (0=stars 3=galaxies -1=all)

       -h     Print heading, else do not

       -j <RA> <Dec>
	      Output J2000 (FK5) coordinates around this center

       -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 for output file naming

       -r <radius>
	      Radius of search circle 1in arcsec (default 10)

       -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.gsc

See Also
       scat(1), rgsc(1), suac(1), susac(1), imgsc(1)

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

14 April 1998								WCS								   sgsc(1)