Visit ASIAA Homepage Registration Deadline: August 15, 2019 (Taiwan Time)
Science with the Submillimeter Array: Present and Future
November 4(Mon)-5(Tue), 2019
ASIAA, Taipei, Taiwan

Poster Presentation

Greenland Telescope and the VLBI Collaboration

Author(s): Satoki Matsushita (ASIAA) and the Greenland Telescope Project Members

Presenter: Satoki Matsushita (ASIAA)

Greenland Telescope (GLT) project is aiming to image and study the black hole shadow and jets using millimeter- and submillimeter-wave very long baseline interferometry (mm/submm-VLBI) technique together with other mm/submm telescopes all over the world, especially with the Atacama Large Millimeter/submillimeter Array (ALMA), the James Clerk Maxwell Telescope (JCMT), and the Submillimeter Array (SMA). We chose the Summit of the Greenland ice sheet as the GLT site, because the site conditions have low submillimeter opacity, and because its location offers favorable baselines to existing submillimeter telescopes for VLBI, especially with ALMA, which extends the north-south baseline length to more than 9000 km. The GLT antenna is the 12-m ALMA North America prototype antenna, and has been retrofitted for the extreme weather. We have successfully deployed the antenna to Thule, Greenland, which location is to commission and test the antenna before it will be brought up to the Summit. Three receivers (86 GHz, 230 GHz, and 345 GHz) have been installed in the receiver cabin, and the first astronomical light and fringes have been detected on December 2017 and on March 2018, respectively. Since April 2018, we are constantly joining the Event Horizon Telescope (EHT) 230 GHz VLBI observations and the Global Millimeter VLBI Array (GMVA) 86 GHz VLBI observations. In this conference, we will present the current status of the GLT and its future plan.

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