| Autor: |
Timothy Norton, Pierre Martin-Cocher, Geoffrey C. Bower, Chih-Wei Locutus Huang, Wen Ping Lo, Hung Yi Pu, George Nystrom, Jongho Park, Chih Chiang Han, Cristina Romero-Cañizales, Shu Hao Chang, Kuan Yu Liu, Peter Oshiro, Derek Kubo, Ramprasad Rao, Paul Shaw, Keiichi Asada, Philippe Raffin, Masanori Nakamura, Chao-Te Li, Chen Yu Yu, Satoki Matsushita, Ryan Chilson, Homin Jiang, Yau De Huang, Ranjani Srinivasan, Chung Cheng Chen, Jun Yi Koay, Nimesh A. Patel, Makoto Inoue, Patrick M. Koch, C. Y. Kuo, Ming-Tang Chen, Ta Shun Wei, Paul T. P. Ho, Ching Tang Liu, Tirupati K. Sridharan, Shoko Koyama |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Ground-based and Airborne Telescopes VIII. |
| DOI: |
10.1117/12.2561491 |
| Popis: |
The Greenland Telescope (GLT), currently located at Thule Air Base, is a 12-m single dish telescope operating at frequencies of 86, 230 and 345 GHz. Since April 2018, the GLT has regularly participated in (sub-)mm VLBI observations of supermassive black holes as part of the Event Horizon Telescope (EHT) and the Global mm VLBI Array (GMVA). We present the status of scientific commissioning activities at the GLT, including most recently the 345 GHz first light and test observations. The antenna surface accuracy has been improved to ~25 microns through panel adjustments aided by photogrammetry, significantly increasing the antenna efficiency. Through all-sky spectral line pointing observations (SiO masers at 86 GHz and CO at 230 and 345 GHz), we have improved the radio pointing accuracy down to |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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