The Cosmic Anisotropy Telescope CAT was a three-element interferometer for cosmic microwave background observations at 13 to 17 GHz, based at the Mullard Radio Astronomy Observatory. It was the first instrument to measure small-scale structure in the cosmic microwave background radiation in 1995. When the more sensitive Very Small Array came online, the CAT telescope was decomissioned in a ceremonial bonfire.

External links

• Cosmic Anisotropy Telescope (CAT) on the internet
• The first detection of small-scale structure in the cosmic microwave background radiation
• Press release from 1995 describing first measurements of small-scale structure in the cosmic microwave background
• The CAT enclosure on Google Maps

Radio telescopes | Cavendish Laboratory | Interferometers