gsc23.cgi - CGI-script for GSC2.3.2 catalog searching
It is a Web-frontend for gsc23 utility.
Usage is similar to scat.cgi from WCSTools.
Results will be returned as a tab-separated Starbase table
Enter a sequence of keyword=value, separated by &, in one line

keyword  value description
-------  ------------------------------------------------
ra       right ascension in degrees or hh:mm:ss.sss
dec      declination in degrees or [+/-]dd:mm:ss.sss
nstar    maximum number of stars to be returned
rad      search radius in arcseconds
	 (negate for square box)
sort     dist   distance from search center
	 ra     right ascension
	 dec    declination
	 mag    magnitude (brightest first)
	 none   no sort
cformat  col    output coordinates hh:mm:ss dd:mm:ss
	 deg    output coordinates in degrees
	 rad    output coordinates in radians
min      minimum magnitude
max      maximum magnitude
help     List of web parameters (this list)