Introduction

The Facilities Summary (FACSUM) display is an informational widget providing the current telescope status (pointing, date, guiding, focus, etc.). FACSUM is a monitor program and offers no controls. Below is a description of the information items located on the FACSUM widget.

To start FACSUM, right click on the desktop and from the popup menu select:

K1 Telescope Status Menu --> FACSUM

Stop FACSUM by using the Close option from the window menu, accessible by clicking the button at the top left of the window.


FACSUM: Typical display of facsum

Status Indicators
Name Description Indicators
Telescope Telescope Status tracking
slewing
not controlling
No Status
Mirror Active Control System Status run
idle
No Status
Guider Guiding status guiding
not guiding
No Status
Dome Dome status tracking
in position
standby
No Status
Rotator Instrument Rotator Status tracking
standby
fault
No Status
Information Fields
Name Description
LST Gives the Local Siderial Time. This corresponds to the Right Ascension currently crossing the meridian.
UT Universal Date and Time (note: 10 hours ahead of HST)
Time until
limit (h)
Time remaining until this target will become inaccessible due to telescope constraints.
Target
limit (h)
Name of the target as given in the starlist. The target will read slewing when moving to an object. Note: The target name is written in white above the base coordinates, and there is not label.
Base Coordinates RA (α) and Dec (δ) to which the telescope was originally pointed. Due to tweaks required to center objects, atmospheric dispersion, etc., this will tend to differ from the current coordinates.
Current coordinates RA (α) and Dec (δ) now lying at the selected pointing origin.
Offset These numbers, lying below the current coordinates indicate the offsets between the base and current coordinates. [arcsec]
Eq. Equinox of the coordinate system. [years]
El. Current telescope altitude angle. [degrees]
Rotator mode Current operating mode of the rotator. Options are: stationary, position angle, vertical (????), ????
Sky PA Position angle of the instrument relative to celestial North. [degrees]. (Meaning in stationary mode ????).
Drive Physical rotator angle. [degrees]
Airmass The number of airmasses lying along the path to the target. When overhead, the value is 1.
Focus Position of the secondary mirror piston, a gross measure of focus. [mm]
Dome Azimuth angle of the dome. [degrees]
AZ Azimuth angle of the telescope. [degrees]
HA Hour angle. The difference between the LST and the RA, this gives a measure of how long until (or since) the object crosses the meridian.
ca, ce
PO Current operating instrument and name of the selected pointing origin . To view the pointing origins, see the pointing origins documentation