The ESO 1.4 m CAT

The recently decommissioned 1.4 meter Coudé Auxillary Telescope (CAT) has an unusual Alt-Alt mounting. It feeds light into the Coudé train of the 3.6 m telescope, when the Coudé Echelle Spectrometer is not used in the fibre-feed mode by the 3.6m. The roll axis is also not horizontal, why the projection of sky coordinates on the the telescope roll and tilt axes is funny.

Latest update: January 4, 1999