{"id":192,"date":"2014-11-13T00:01:05","date_gmt":"2014-11-13T00:01:05","guid":{"rendered":"http:\/\/www.eaobservatory.org\/jcmt\/?page_id=192"},"modified":"2026-03-23T17:31:07","modified_gmt":"2026-03-24T03:31:07","slug":"proposals","status":"publish","type":"page","link":"https:\/\/www.eaobservatory.org\/jcmt\/proposals\/","title":{"rendered":"Observing Proposals"},"content":{"rendered":"<p style=\"text-align: justify;\">The JCMT operates on a two-semester basis for PI time. <em>Semester A<\/em> running from February 1st to July 31st and <em>Semester B<\/em> running from August 1st to January 31st. The deadline for Semester A\u00a0 proposals is typically mid September. The deadline for Semester B proposals is typically mid March. The Call for Proposals usually open one month before the deadline.<\/p>\n<p>In addition to the biannual semesters of the &#8220;Regular&#8221; queue, an &#8220;Urgent&#8221; queue, specifically for science proposals of an urgent nature, remains open for submissions throughout the year.<\/p>\n<hr \/>\n<h1>Call for Proposals for Semester 2026<\/h1>\n<p>Below you can find the open call for proposals for semester 2026A and 2026B.<\/p>\n<hr \/>\n<h3><strong>2026B JCMT Regular Call for Proposals<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">The East Asian Observatory (EAO) is pleased to announce the <\/span><b>regular call for proposals for Semester 26B<\/b><span style=\"font-weight: 400;\"> at the James Clerk Maxwell Telescope (JCMT). Please submit your proposals via the JCMT proposal handling system, Hedwig. For full details and submission instructions, please visit:<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/proposals.eaobservatory.org\/jcmt\/semester\/30\/regular\"><span style=\"font-weight: 400;\">https:\/\/proposals.eaobservatory.org\/jcmt\/semester\/30\/regular<\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">The deadline for 26B Principal Investigator (PI) Proposals is <\/span><b>April 4, 2026, at 01:00 UTC<\/b><span style=\"font-weight: 400;\">. The Hedwig system permits the submission (and editing) of proposals until this deadline.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The instruments available for the 26B semester are listed below, along with their respective availability:<\/span><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/\"><span style=\"font-weight: 400;\">\u02bbAla\u02bbihi (86 GHz)<\/span><\/a><span style=\"font-weight: 400;\">, \u02bb<\/span><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/uu-230ghz\/\"><span style=\"font-weight: 400;\">\u016a\u02bb\u016b (230 GHz)<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/harp\/\"><span style=\"font-weight: 400;\">HARP (345 GHz)<\/span><\/a><span style=\"font-weight: 400;\"> will be available throughout the semester.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/\"><span style=\"font-weight: 400;\">\u02bb\u0100weoweo (345 GHz)<\/span><\/a><span style=\"font-weight: 400;\"> is planned to be available during the first half of the semester.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/\"><span style=\"font-weight: 400;\">Kuntur (690 GHz)<\/span><\/a><span style=\"font-weight: 400;\"> is planned to be available during the second half of the semester.\u00a0<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">\u02bbAla\u02bbihi, Kuntur, and \u02bb\u0100weoweo are offered in a shared-risk mode. When installed, Kuntur replaces \u02bb\u0100weoweo in the N\u0101makanui receiver. The precise dates of the instrument swap and the resulting availability will be decided based on instrument demand.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Kuntur is a 690 GHz receiver offered to the JCMT community in collaboration with the Large Latin American Millimeter Array (LLAMA). Kuntur is a sideband-separating (2SB), dual-polarization receiver, with an observable sky frequency range of approximately 609 to 715 GHz (default IF 5.5 GHz).\u00a0<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">\u02bbAla\u02bbihi is a dual-polarization, single-sideband (SSB) receiver, operating in upper sideband (USB) only, with an LO frequency range of 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\u2019s performance for different IF values (e.g., 7 GHz) is under ongoing characterization.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">The respective instrument webpages will be updated with definitive commissioning results for <\/span><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/\"><span style=\"font-weight: 400;\">\u02bbAla\u02bbihi<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/\"><span style=\"font-weight: 400;\">Kuntur<\/span><\/a><span style=\"font-weight: 400;\">, and <\/span><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/\"><span style=\"font-weight: 400;\">\u02bb\u0100weoweo<\/span><\/a><span style=\"font-weight: 400;\"> as they become available. For further information, please visit the JCMT instruments webpage:<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/\"><span style=\"font-weight: 400;\">https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/<\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">PIs must meet the regional or institutional affiliation requirements for Taiwan, Thailand, the United Kingdom, Max Planck Institutes and German universities, or the 26B semester Expanding Partner Program regions (Brazil and Argentina). Co-I status is not similarly restricted. For details regarding PI eligibility, please see:<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/proposals\/eao_eligibility\/\"><span style=\"font-weight: 400;\">https:\/\/www.eaobservatory.org\/jcmt\/proposals\/eao_eligibility\/<\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">If this is your first time using Hedwig, you should use the \u2018Log In\u2019 button to generate an account. There is a Hedwig \u2018Help\u2019 facility at the upper right corner of each page, and individual Help tags in many other places.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Please contact us at <\/span><span style=\"font-weight: 400;\">helpdesk@eaobservatory.org<\/span><span style=\"font-weight: 400;\"> if you have any questions.<\/span><\/p>\n<hr \/>\n<h3><strong>2026A JCMT Supplemental Rolling Call for Proposals<\/strong><\/h3>\n<p dir=\"ltr\">The East Asian Observatory (EAO) announces a <strong>supplemental rolling<\/strong> call for proposals for Semester 26A at the James Clerk Maxwell Telescope (JCMT).<\/p>\n<p>Submissions are also invited for the Semester 26A supplemental rolling call, specifically for proposals with targets in the right ascension (R.A.) range of<strong> 09 h to 15 h<\/strong>; observations outside this range will not be scheduled. We particularly encourage proposals with targets visible at elevations above 30 degrees in the middle part of the 09 h to 15 h LST window, as well as those requesting weather bands 3 to 5. A total of 440 hours remains available across all weather bands.<\/p>\n<p dir=\"ltr\">Proposals will be processed on a rolling basis until the Semester 26A queue is full. Submissions must include a technical justification and a science justification, the latter of which is limited to one page (shorter than the requirement for regular JCMT calls). Submitted proposals will undergo immediate internal review by JCMT scientific staff, with evaluations based on technical feasibility and scientific merit.<\/p>\n<p dir=\"ltr\">Please submit your proposals via the JCMT proposal handling system, Hedwig. For full details and submission instructions, please visit:<\/p>\n<p dir=\"ltr\"><a href=\"https:\/\/proposals.eaobservatory.org\/jcmt\/semester\/28\/rolling\/1\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/proposals.eaobservatory.org\/jcmt\/semester\/28\/rolling\/1&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw0oYCaTAK-H7_rYMx88TT0i\">https:\/\/proposals.<wbr \/>eaobservatory.org\/jcmt\/<wbr \/>semester\/28\/rolling\/1<\/a><\/p>\n<p dir=\"ltr\">The instruments available for the 26A semester are listed below, with their availability dates:<\/p>\n<ul>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\">\u02bb<a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/uu-230ghz\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/uu-230ghz\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw2TBlxDVkAYHbj8f6qx9y66\">\u016a\u02bb\u016b (230 GHz)<\/a>: Will be available throughout the semester (February 1st \u2013 July 31st).<\/p>\n<\/li>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/harp\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/harp\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw3ue-umQuSBfPqZ55VCQPWL\">HARP (345 GHz)<\/a>: Will be available throughout the semester (February 1st \u2013 July 31st).<\/p>\n<\/li>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw2d5yXE8Zin31WEjIMnYYYX\">\u02bb\u0100weoweo (345 GHz)<\/a>: Is planned to be available from June until the end of the semester (July 31st).<\/p>\n<\/li>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw08Jh9MA3jWjbplCAMPRRSb\">Kuntur (690 GHz)<\/a>: Is planned to be available until mid-May.<\/p>\n<\/li>\n<li dir=\"ltr\" aria-level=\"1\">\n<p dir=\"ltr\" role=\"presentation\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw1IW7o2pvBKVL4cUvQJS33z\">\u02bbAla\u02bbihi (86 GHz)<\/a>: Will be available for use throughout the 26A semester.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u02bbAla\u02bbihi, Kuntur, and \u02bb\u0100weoweo are offered in a shared-risk mode.<\/p>\n<p dir=\"ltr\">Kuntur is a 690 GHz receiver offered to the JCMT community in collaboration with the Large Latin American Millimeter Array (LLAMA). Kuntur is a sideband-separating (2SB), dual-polarization receiver, with an observable sky frequency range of approximately 609 to 715 GHz (default IF 5.5 GHz). When installed, the instrument replaces the \u02bb\u0100weoweo cartridge in the N\u0101makanui receiver. \u02bb\u0100weoweo is planned to be re-installed in this position in mid-May 2026, in place of Kuntur.<\/p>\n<p dir=\"ltr\">\u02bbAla\u02bbihi is a dual-polarization, single-sideband (SSB) receiver, operating in upper sideband (USB) only, with an LO frequency range of 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\u2019s performance for different IF values (e.g., 7 GHz) is under ongoing characterization.<\/p>\n<p dir=\"ltr\">The respective instrument webpages will be updated with definitive commissioning results for <a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/alaihi\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw1IW7o2pvBKVL4cUvQJS33z\">\u02bbAla\u02bbihi<\/a>, <a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/kuntur\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw08Jh9MA3jWjbplCAMPRRSb\">Kuntur<\/a>, and <a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/namakanui\/aweoweo-345ghz\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw2d5yXE8Zin31WEjIMnYYYX\">\u02bb\u0100weoweo<\/a> as they become available. For further information, please visit the JCMT instruments webpage:<\/p>\n<p dir=\"ltr\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/instrumentation\/heterodyne\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw3pZz2Q8XPypFD29ZBhG-c0\">https:\/\/www.eaobservatory.org\/<wbr \/>jcmt\/instrumentation\/<wbr \/>heterodyne\/<\/a><\/p>\n<p dir=\"ltr\">For information about PI eligibility and the Expanding Partner Program, please see:<\/p>\n<p dir=\"ltr\"><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/proposals\/eao_eligibility\/\" target=\"_blank\" rel=\"nofollow noopener\" data-saferedirecturl=\"https:\/\/www.google.com\/url?hl=en&amp;q=https:\/\/www.eaobservatory.org\/jcmt\/proposals\/eao_eligibility\/&amp;source=gmail&amp;ust=1772065502024000&amp;usg=AOvVaw2BuoPNpnNrzs91T8gzYnQO\">https:\/\/www.eaobservatory.org\/<wbr \/>jcmt\/proposals\/eao_<wbr \/>eligibility\/<\/a><\/p>\n<p dir=\"ltr\">If this is your first time using Hedwig, you should use the \u2018Log In\u2019 button to generate an account. There is a Hedwig \u2018Help\u2019 facility at the upper right corner of each page, and individual Help tags in many other places.<\/p>\n<p dir=\"ltr\">Please contact us at <a href=\"mailto:helpdesk@eaobservatory.org\" target=\"_blank\" rel=\"nofollow noopener\">helpdesk@eaobservatory.org<\/a> if you have any questions.<\/p>\n<header>\n<hr \/>\n<\/header>\n<header class=\"entry-header\">The following pages will help you prepare a proposal for submission:<\/header>\n<ul>\n<li>Check the <span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" title=\"JCMT Science Archive\" href=\"http:\/\/www.eaobservatory.org\/jcmt\/science\/archive\/\">JCMT Science Archive<\/a><\/span> to see if data already exists!<\/li>\n<li>Check if data already exists on your object:\n<ul>\n<li>use the <a href=\"https:\/\/proposals.eaobservatory.org\/jcmt\/tool\/clash\">new general clash tool<\/a> to check if the data already exists on your target (looks through all publicly available data).<\/li>\n<\/ul>\n<\/li>\n<li>Are you eligible to submit as PI ? &#8211; check your nationality \/ affiliation <span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" title=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/EAO_eligibility\/\" href=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/EAO_eligibility\/\">here<\/a><\/span><\/li>\n<li>JCMT Proposal Collaboration rules are described <a href=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/collaborations\/\">here<\/a><\/li>\n<li><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" title=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/hedwig\/\" href=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/hedwig\/\">Proposal Submission<\/a><\/span><\/li>\n<li><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" title=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/justification-files\/\" href=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/justification-files\/\">Preparing justification files<\/a><\/span><\/li>\n<li><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" title=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/checklist\/\" href=\"http:\/\/www.eaobservatory.org\/jcmt\/proposals\/checklist\/\">Submissions Checklist<\/a><\/span><\/li>\n<li><a href=\"https:\/\/www.eaobservatory.org\/jcmt\/2025\/03\/closed-proposals\/\">Closed calls for proposals<\/a><\/li>\n<\/ul>\n<p>or\u00a0 &#8211; &#8211; if you are ready to go:<span style=\"color: #3366ff;\"> <a style=\"color: #3366ff;\" title=\"https:\/\/proposals.eaobservatory.org\/\" href=\"https:\/\/proposals.eaobservatory.org\/\">login to Hedwig<\/a><\/span>. Good Luck!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The JCMT operates on a two-semester basis for PI time. Semester A running from February 1st to July 31st and Semester B running from August 1st to January 31st. The deadline for Semester A\u00a0 proposals is typically mid September. The deadline for Semester B proposals is typically mid March. The\u2026 <a class=\"continue-reading-link\" href=\"https:\/\/www.eaobservatory.org\/jcmt\/proposals\/\">Continue reading<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/192"}],"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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/comments?post=192"}],"version-history":[{"count":170,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/192\/revisions"}],"predecessor-version":[{"id":13514,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/192\/revisions\/13514"}],"wp:attachment":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/media?parent=192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}