Data entry

DATE

The epoch of observation (year, to an accuracy of 3 decimal places, or in DEC standard format), defaulting to the current date and time.

APERTURE

x y: observing aperture coordinates (defaults determined by the telescope/focal station combination).

MAGNITUDE

V V : bright and faint V magnitude limits. These should default to the standard values for the configuration.

SEPARATION

Minimum separation of guide stars (arcsec). Overrides system default (5 arcsec for telescope configurations; zero for NONE).

NUMBER

The maximum number of guide stars to be selected at a given position angle. Overrides system default.

CONFIGURATION

Telescope Focus Date x y V V number
Only telescope and focus are mandatory. Spaces must be used as separators between fields and unspecified parameters at the end of the list are defaulted. The current list of telescope and focal station combinations is given in Section 5.1.

DEFAULT

one of DATE, APERTURE, MAGNITUDE, NUMBER, SEPARATION, ALL. Reset the relevant configuration parameters to their default values.

ROTATOR

PA ( - ).

CATALOGUE

Filename. The name of a source catalogue to be used as a list of target positions. Standard VMS syntax, defaulting to the current directory with a .CAT extension.

DEVICE

device-name. Set the GKS device to be used for plotting. To get a list of workstation names, type DEVICE followed by ?. The most commonly-used device names on La Palma are:

PERICOM_MG

Pericom graphics terminal.

CANON_L

Canon laser-printer (landscape mode). Note that a device-name of CANON_L;filename causes the plot output to be written to a file called filename rather than the usual CANON.DAT.

XWINDOWS

Vaxstation window.