Cosmic Anisotropy Telescope

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Stitched panorama of the CAT enclosure in June 2014

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

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Coordinates: 52°09′58″N 0°02′02″E / 52.166°N 0.034°E / 52.166; 0.034