The Guide Star Server (GSS)

To access the Guide Star Server, pull up an XTERM on lpss10 and TELNET to lpvs1

          Username: GSS
          Password:                      (check the white board)
     
          $ which telescope (WHT/INT/JKT)? JKT
          $ GSS
          GSS> CONFIG JKT CCDE

          GSS> SEARCH  hh mm ss.s  dd mm ss  B1950 (or J2000)
          GSS> EXIT
          $ TYPE OUTPUT.GS

This is the simplest format. For more info refer to the document by Robert Laing (http://ing.iac.es/ manuals/man_var.html).

The search coordinates should be the current telescope coordinates !! These may differ from the coordinates you entered into the TCS catalogue.

Alternatively run the GSS with an input file, rather than interactively. The file must only contain search records as above and it is essential that positive declinations are unsigned (i.e. Do not use + explicitly, the software will fail). The file must have a .com extension (e.g. PHIL.COM). Then:

        $ GSS
        GSS> CONFIG JKT CCDE

        GSS> DO PHIL
        GSS> EXIT
        $ TYPE OUTPUT.GS

Guide star output in OUTPUT.GS is tagged with an asterisk if the object is classified as stellar on all GSC fields and a question mark represents an ambiguous classification. No symbol is given for objects classified as non-stellar on all plates. These should only be used as guide stars in cases of dire need.