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First Simultaneous Dual-Frequency Phase Referencing VLBI Observation with KVN
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  • First Simultaneous Dual-Frequency Phase Referencing VLBI Observation with KVN
  • First Simultaneous Dual-Frequency Phase Referencing VLBI Observation with KVN
저자명
정태현,손봉원,변도영,Jung. Tae-Hyun,Sohn. Bong-Won,Byun. Do-Young
간행물명
천문학회보
권/호정보
2011년|36권 2호|pp.128-128 (1 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

We present the results of the first simultaneous dual-frequency VLBI observation with KVN (Korean VLBI Network). The KVN has a unique multi-frequency receiving system performing simultaneous observations at four frequencies, such as 22, 43, 86, and 129 GHz, in order to calibrate the atmospheric phase fluctuations, which cause a severe degradation of an interferometric coherence in mm-VLBI regime. In order to test the multi-frequency phase referencing capability of KVN, we observe the bright continuum VLBI source, NRAO 150 at two different frequencies of 21.7 (K band) and 43.4 (Q band) GHz simultaneously. The VLBI fringe phases at K and Q bands show a tight correlation of phase behaviors and the results of phase referencing (residual phase, coherence etc) are promising for achieving excellent phase referencing observations with KVN. The KVN will be able to open new perspectives in the multi-frequency study of VLBI.