CAT Telescope

CAT Telescope:

The Coude Auxiliary Telescope (CAT) was designed to feed the Coude Echelle Spectrometer (CES). The CAT stands on a 24m high pillar alongside the 3.6m telescope building and is connected to the 3.6m coude room via an 11m long tube. The control room for CAT and CES is located in the dome of the 3.6m telescope. The telescope has a clear aperture of 1.4m. It has an alt-alt mounting producing field rotation during observations. The telescope optics are of the Dahl-Kirkham type with an ellipsoidal primary and a spherical secondary. The third mirror is a Nasmyth focus mirror which rotates at half tube speed in order to maintain a fixed light beam in space.

CAT
LOCATION 70°43'53.9"W
29°15'38.8"S
2387 m.

DIAMETER 140 cm.

MOUNT Altitude-Azimuth

OPTICAL DESIGN Dahl-Kirkham

OPERATING SINCE 1980

MODES FOCAL SCALE LARGE FIELD SMALL FIELD INSTRUMENTATION

NASMYTH 32.3 4.54 "/mm 3.2'x 2.4'
75 mm/arcmin 69"x 51"
3.5 mm/arcmin CES

PRIME FOCUS
FIBER LINK

CAT
		LOCATION	70°43'53.9"W 29°15'38.8"S 2387 m.
		DIAMETER	140 cm.
		MOUNT	Altitude-Azimuth
		OPTICAL DESIGN	Dahl-Kirkham
		OPERATING SINCE	1980
MODES	FOCAL	SCALE	LARGE FIELD	SMALL FIELD	INSTRUMENTATION
NASMYTH	32.3	4.54 "/mm	3.2'x 2.4' 75 mm/arcmin	69"x 51" 3.5 mm/arcmin	CES
PRIME FOCUS FIBER LINK					CES