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JCMT: James Clerk Maxwell Telescope

James Clerk Maxwell Telescope

With a diameter of 15m the James Clerk Maxwell Telescope (JCMT) is the largest astronomical telescope in the world designed specifically to operate in the submillimeter wavelength region of the spectrum. The JCMT is used to study our Solar System, interstellar dust and gas, and distant galaxies. It is situated close to the summit of Mauna Kea, Hawaii, at an altitude of 4092m. (more)

Latest News Flexible Observing
Completion of the NGLS Nearby Galaxies
Legacy Survey

Update on JCMT Ownership (NEW)

Completion of the SONS Debris Disk Legacy Survey

Note to the Community
Board Meeting May 2014

Update on JCMT Ownership

Note to the Community
Board Meeting December 2013

New JCMT Newsletter is now available [pdf] 
No Supplemental Call in 14A

Semester 14A JCMT Call for proposals
(closed) 17-Sep-2013

JCMT Announcement of Opportunity

Note to the Community
Board Meeting June 2013

Older News Items

Download the latest version of the JCMT Observing Tool. Detailed descriptions of observing modes are also available here.

OMP Access to your Project

Observing at the JCMT


Starlink software collection

The JCMT is supported by the Science and Technology Facilities Council and the National Research Council Canada.
It is overseen by the JCMT Board.
Acknowledging JCMT Data

Contact: Linda Gregoire. Updated: Thu Oct 30 10:22:15 HST 2014

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