Standard configurations

 

In order to find guide stars, the GSS needs to be told the telescope and focal station/instrument combination (referred to as the configuration) and the position angle of the instrument rotator. The current configurations are:

WHT CASS

WHT Cassegrain focus with the guide probe restrictions appropriate for slit-viewing, used with ISIS and FOS.

WHT AUXPORT

WHT Cassegrain focus with no restrictions on guide probe movement (appropriate for LDSS and auxiliary port imaging).

WHT TAURUS

WHT Cassegrain focus with Taurus (as AUXPORT, but with a different rotational offset).

WHT PRIME

WHT Prime focus CCD imaging (not Autofib/WYFFOS, where guide stars should be found as part of the set-up of the fibre positioner).

WHT UESPROBE

WHT UES Nasmyth focus with derotation optics (moving guide probe).

INT PRIME

INT Prime focus (imaging CCD, photographic camera)

INT CASS

INT Cassegrain focus (IDS, FOS etc. )

JKT CCDE

JKT f/15 Cassegrain + CCD East of the pier

JKT CCDW

JKT f/15 Cassegrain + CCD West of the pier

JKT WFCE

JKT f/8 Cassegrain + wide-field camera East of the pier

JKT WFCW

f/8 Cassegrain + wide-field camera West of the pier

NONE

Nearest star search (this is independent of telescope, and is intended merely to locate the star(s) nearest to the target position, e.g. for use as references in blind offsetting).

In order to specify the configuration, use the command CONFIG configuration_name at the GSS$>$ prompt. The position angle is input using the ROTATOR command, for example:

GSS>CONFIG WHT CASS
GSS>ROTATOR 180