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.
|MODES||FOCAL||SCALE||LARGE FIELD||SMALL FIELD||INSTRUMENTATION|
|NASMYTH||32.3||4.54 "/mm||3.2'x 2.4'|
| 69"x 51" |
| PRIME FOCUS |