RENOVATION OF SEOUL RADIO ASTRONOMY OBSERVATORY AND ITS FIRST MILLIMETER VLBI OBSERVATIONS
(주)코리아스칼라
- 최초 등록일
- 2023.04.03
- 최종 저작일
- 2022.12
- 7페이지/ 어도비 PDF
- 가격 4,000원
* 본 문서는 배포용으로 복사 및 편집이 불가합니다.
서지정보
ㆍ발행기관 : 한국천문학회
ㆍ수록지정보 : 천문학회지 / 55권 / 6호
ㆍ저자명 : Naeun Shin, Yong-Sun Park, Do-Young Byun, Jinguk Seo, Dongkok Kim, Cheulhong Min, Hyunwoo Kang, Keiichi Asada, Wen-Ping Lo, Sascha Trippe
목차
Abstract
1. INTRODUCTION
2. RETROFIT OF THE RECEIVER SYSTEM
2.1. Import of a CARMA Receiver
2.2. Cryogenic System
2.3. Signal Chain
2.4. Alignment of the Receiver
3. INSTALLATION OF VLBI EQUIPMENT
4. TEST OBSERVATIONS
4.1. Single-Dish Observations
4.2. VLBI Test Observations
5. DISCUSSION AND CONCLUSIONS
ACKNOWLEDGMENTS
REFERENCES
영어 초록
The Seoul Radio Astronomy Observatory (SRAO) operates a 6.1-meter radio telescope on the Gwanak campus of Seoul National University. We present the efforts to reform SRAO to a Very Long Baseline Interferometry (VLBI) station, motivated by recent achievements by millimeter interferometer networks such as Event Horizon Telescope, East Asia VLBI Network, and Korean VLBI Network (KVN). For this goal, we installed a receiver that had been used in the Combined Array for Research in Millimeterwave Astronomy and a digital backend, including an H-maser clock. The existing hardware and software were also revised, which had been dedicated only to single-dish operations. After several years of preparations and test observations in 1 and 3-millimeter bands, a fringe was successfully detected toward 3C 84 in 86 GHz in June 2022 for a baseline between SRAO and KVN Ulsan station separated by 300 km. Thanks to the dual frequency operation of the receiver, the VLBI observations will soon be extended to the 1 mm band and verify the frequency phase referencing technique between 1 and 3-millimeter bands.
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