UKT14<\/h2>\n
UKT14 was a single pixel bolometer. It had filters at 2000, 1300, 1100, 850, 800, 750, 450, and 350 micron. The beamwidth ranged from 27 arcsec at 2000 micron to 6 arcsec at 350 micron. See A millimetre\/submillimetre common user photometer for the James Clerk Maxwell Telescope. Duncan et al.<\/a> for more information about UKT14.<\/p>\n SCUBA’s original design allowed for observations also at 350, 750, 1100, 1300 and 2000 microns, but due to engineering problems which began in 1997, these windows were not available.<\/p>\n SCUBA was cooled to below 100mK by means of a dilution refrigerator, which means SCUBA’s sensitivity is limited by the photon noise from the sky and telescope background at all wavelengths. The background power was further limited by a combination of single-moded conical feedhorns and narrow-band filters.<\/p>\n See SCUBA: a common-user submillimetre camera operating on the James Clerk Maxwell Telescope. Holland et al.<\/a> for more information about SCUBA.<\/p>\n Reduced SCUBA data can also be found in the SCUBA Legacy Catalogues <\/a>and in theSCUBA Polarimeter Legacy Catalogue<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" In the JCMT Science Archive one can find data obtained with the following continuum receivers. Receiver Name Time UKT14 1989-02-09 to 1997-10-29 SCUBA 1997-05-22\u00a0 to 2005-06-06 UKT14 UKT14 was a single pixel bolometer. It had filters at 2000, 1300, 1100, 850, 800, 750, 450, and 350 micron. The beamwidth ranged\u2026 Continue reading<\/a><\/p>\n","protected":false},"author":10,"featured_media":0,"parent":174,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/template-onecolumn.php","meta":[],"_links":{"self":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/3183"}],"collection":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/comments?post=3183"}],"version-history":[{"count":14,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/3183\/revisions"}],"predecessor-version":[{"id":6686,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/3183\/revisions\/6686"}],"up":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/174"}],"wp:attachment":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/media?parent=3183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}SCUBA<\/h2>\n
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\nSCUBA was a submillimetre continuum array receiver, with a field of view 2.3 arcmin in diameter. It had two hexagonal arrays of bolometric detectors (or pixels); the Long-Wave (LW) array had 37 pixels, while the Short-Wave (SW) array had 91 pixels. Both arrays were used simultaneously by means of a dichroic beamsplitter, which in SCUBA’s prime mode corresponded to observing at 450 microns on the SW array and 850 microns on the LW array. Each of the pixels had diffraction-limited resolution, corresponding to about 7.5 arcseconds at 450 micron, and 14 arcseconds at 850 micron. The arrays could be used to make maps, in either the “jiggle-map” or “scan-map” modes, or as photometers, where only the central pixel on each array is used. A polarimeter could also be attached to the front window of SCUBA which then allows polarimetric photometry and jiggle-map modes.<\/p>\n