page_title: James Clerk Maxwell Telescope
section_title: SCUBA
hierarchical_section_title: James Clerk Maxwell Telescope / Instrumentation / SCUBA
caption_attribution_description: English: The Submillimetre Common-User Bolometer Array instrument used on the James Clerk Maxwell Telescope between 1990 and 2005. Now on display at the national museum of scotland.
context_page_description: The James Clerk Maxwell Telescope is a submillimetre-wavelength telescope at Mauna Kea Observatory in Hawaii, US. The telescope is near the summit of Mauna Kea at 13,425 feet. Its primary mirror is 15 metres across: it is the largest single-dish telescope that operates in submillimetre wavelengths of the electromagnetic spectrum. Scientists use it to study the Solar System, interstellar dust and gas, and distant galaxies.
  The JCMT started operations in 1987, and was funded until February 2015 by a partnership between the United Kingdom and Canada, and the Netherlands. It was operated by the Joint Astronomy Centre and was named in honour of mathematical physicist James Clerk Maxwell. In March 2015 the operation of the JCMT was taken over by the East Asian Observatory.
  The telescope was combined with the Caltech Submillimeter Observatory next to it, to form the first submillimetre interferometer. This success was important in pushing ahead the construction of the later Submillimeter Array and the Atacama Large Millimeter Array interferometers. In recent years it has also taken part in Event Horizon Telescope observations, which produced the first direct image of a black hole.
context_section_description: The older continuum single pixel UKT14 bolometer receiver was replaced around 1995 by the Submillimetre Common-User Bolometer Array (SCUBA). This instrument operated simultaneously at wavelengths of 450 and 850 micron (with 91 and 37 pixels, respectively), and was sensitive to the thermal emission from interstellar dust. SCUBA was a ground-breaking instrument, among the most high-impact astronomy instruments from 1997-2003; it was retired from service in 2005, and is now in the National Museum of Scotland.
caption: The Submillimetre Common-User Bolometer Array
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