{"id":13415,"date":"2025-11-24T11:23:04","date_gmt":"2025-11-24T21:23:04","guid":{"rendered":"https:\/\/www.eaobservatory.org\/jcmt\/?page_id=13415"},"modified":"2025-11-26T17:15:27","modified_gmt":"2025-11-27T03:15:27","slug":"alaihi","status":"publish","type":"page","link":"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/","title":{"rendered":"\u02bbAla\u02bbihi (86 GHz)"},"content":{"rendered":"

Current Status:<\/strong><\/a> Commissioning\/Shared risk science<\/span><\/p>\n

\u02bbAla\u02bbihi <\/span>is an insert that can be installed within the N\u0101makanui<\/a> instrument. It is a dual-polarization, single-sideband (SSB) receiver, operating in upper sideband (USB) only, with a LO frequency range 80.0 to 88.5 GHz. This corresponds to a sky frequency of approximately 86.0 to 94.5 GHz given an IF of 6 GHz. The instrument’s performance for different IF values (e.g., 7 GHz) is under ongoing characterization. Supported observing modes include Stare, Jiggle, and Raster observing modes.<\/p>\n

Current Status for proposals<\/h3>\n

Although the instrument is still being commissioned, EAO already has a preliminary sensitivity calculator<\/a> (integrated into the Hedwig proposal system). \u00a0Measurements of the main beam and aperture efficiency will be taken throughout the commissioning process, and will be made available to users.<\/p>\n

Data Reduction<\/h3>\n

All \u2018Ala\u2018ihi \u00a0data are reducible by the Starlink<\/a> software suite and the output provides a spectra. <\/span>For details on running \u2018Ala\u2018ihi reductions, visit the Heterodyne Data Reduction pages<\/a>. It is recommended that initially users reduce data from both polarizations separately<\/a> to check for issues.<\/p>\n

Notable Molecular Transitions<\/h3>\n

 <\/p>\n\n\n\n\n\n\n\n
Molecule<\/th>\nTransition<\/th>\nRest Frequency<\/th>\n<\/tr>\n
CH3OH<\/td>\n(5-1<\/sub> \u2212 40<\/sub>E)<\/td>\n84.5 GHz<\/td>\n<\/tr>\n
SiO<\/td>\n(2 – 1)<\/td>\n86.2 GHz<\/td>\n<\/tr>\n
HCN<\/td>\n(1 -0)<\/td>\n88.6 GHz<\/td>\n<\/tr>\n
HCO+<\/td>\n(1 – 0)<\/td>\n89.2 GHz<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

References<\/h3>\n

Mizuno et al. (2020), Commissioning of N\u0101makanui on the JCMT,
\nProceedings of the SPIE, Volume 11453, id. 114533T 19 pp.\u00a010.1117\/12.2561742<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Current Status: Commissioning\/Shared risk science \u02bbAla\u02bbihi is an insert that can be installed within the N\u0101makanui instrument. It is a dual-polarization, single-sideband (SSB) receiver, operating in upper sideband (USB) only, with a LO frequency range 80.0 to 88.5 GHz. This corresponds to a sky frequency of approximately 86.0 to 94.5\u2026 Continue reading<\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":8594,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/13415"}],"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\/92"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/comments?post=13415"}],"version-history":[{"count":24,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/13415\/revisions"}],"predecessor-version":[{"id":13440,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/13415\/revisions\/13440"}],"up":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/8594"}],"wp:attachment":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/media?parent=13415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}