{"id":63,"date":"2015-07-01T20:49:00","date_gmt":"2015-07-01T20:49:00","guid":{"rendered":"https:\/\/sites.krieger.jhu.edu\/idg\/?page_id=63"},"modified":"2025-02-11T20:01:24","modified_gmt":"2025-02-11T20:01:24","slug":"wiyn-high-resolution-infrared-camera-whirc","status":"publish","type":"page","link":"https:\/\/sites.krieger.jhu.edu\/idg\/instrumentation\/ground-based-astronomy\/wiyn-high-resolution-infrared-camera-whirc\/","title":{"rendered":"WIYN High Resolution Infrared Camera (WHIRC)"},"content":{"rendered":"\n
\"WHIRC\"<\/figure>
\n

The WIYN High Resolution Infrared Camera (WHIRC) is a high resolution near infrared imager (0.8-2.5 mm) designed to produce superb images over a moderate (3.3\u2032 x 3.4\u2032) field of view on the WIYN 3.5\u00a0m telescope at Kitt Peak National Observatory.\u00a0 It takes scientific advantage of the excellent image quality produced by the telescope and its image stabilization subsystem, the WIYN Tip Tilt Module (WTTM), which is located on one of two Nasmyth ports.\u00a0 WHIRC mounts to WTTM, and reimages the WTTM focal plane to a plate scale of 0.1\u2033 per pixel at the WHIRC detector.\u00a0 Its straight through optical path makes for a compact, very low mass instrument; a necessity given the stringent moment loading requirement at the WTTM interface.\u00a0 The WHIRC optical path consists of a vacuum window, a five-element collimator, a dual filter wheel, a five-element achromatic camera, and finally a 2k2<\/sup>Raytheon VIRGO mercury cadmium telluride (HgCdTe) detector.\u00a0 A novel all-aluminum lens cell design is used to achieve 13\u00a0um lens centering tolerances between critical elements at the 77K operating temperature.\u00a0 A suite of thirteen filters facilitates broad-band (J, H, Ks<\/sub><\/em>) imaging as well as narrow-band imaging tailored to a variety of astronomical investigations.\u00a0 The imaging performance of WHIRC is excellent.\u00a0 Irrespective of seeing, the telescope, and WTTM, WHIRC delivers 0.13\u2033, 0.11\u2033, and 0.08\u2033\u00a0FWHM images in J<\/em>, H<\/em>, and Ks<\/sub><\/em>, respectively.\u00a0 On sky, the imaging is equally impressive yielding images as good as ~ 0.25\u00a0FWHM in Ks<\/sub><\/em>.<\/p>\n<\/div><\/div>\n\n\n\n

\"WIYN_main\"<\/a><\/figure>\n\n\n\n\n","protected":false},"excerpt":{"rendered":"

The WIYN High Resolution Infrared Camera (WHIRC) is a high resolution near infrared imager (0.8-2.5 mm) designed to produce superb images over a moderate (3.3\u2032 x 3.4\u2032) field of view on the WIYN 3.5\u00a0m telescope at Kitt Peak National Observatory.\u00a0 It takes scientific advantage of the excellent image quality produced by the telescope and its […]<\/p>\n","protected":false},"author":47,"featured_media":0,"parent":6,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-63","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/pages\/63","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/users\/47"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/comments?post=63"}],"version-history":[{"count":5,"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/pages\/63\/revisions"}],"predecessor-version":[{"id":897,"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/pages\/63\/revisions\/897"}],"up":[{"embeddable":true,"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/pages\/6"}],"wp:attachment":[{"href":"https:\/\/sites.krieger.jhu.edu\/idg\/wp-json\/wp\/v2\/media?parent=63"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}