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Coudé Auxiliary Telescope (decommissioned)
The ESO Coudé Auxiliary Telescope (CAT) was housed in a smaller dome, adjacent to the 3.6-metre telescope at ESO's La Silla Observatory, and fed the 3.6-metre's Coudé Echelle Spectrometer through a light tunnel. The CAT was fully computer controlled and was used for many different types of astronomical observations, including measuring the ages of ancient stars.
La Silla: Coudé Auxiliary Telescope enclosure (attached to the 3.6-m)
Height: 3670 cm
Diameter: 1520 cm
Science goals
High resolution spectroscopy.
Coudé Auxiliary Telescope
Name:
Coudé Auxiliary Telescope
Site:
La Silla
Altitude:
2375 m
Enclosure:
Classical dome connected to ESO 3.6 m dome
Type:
Spectrographic telescope
Optical design:
Coudé (feeds the spectrograph of the 3.6-metre)
Diameter. Primary M1:
1.47 m
Material. Primary M1:
Borosilicate
Diameter. Secondary M2:
0.22 m
Material. Secondary M2:
N/A (four interchangeable M2 secondaries mounted on a turret)
Diameter. Tertiary M3:
0.254 m
Mount:
Equatorial siderostat mount
First Light date:
5 May 1981
Decommissioning date:
Connected to ESO's 3.60 m telescope via optical fiber in 1998
