Source-Frequency Phase-Referencing Observation of AGNs with KaVA Using Simultaneous Dual-Frequency Receiving.
Source-Frequency Phase-Referencing Observation of AGNs with KaVA Using Simultaneous Dual-Frequency Receiving.
复制标题
DOI：
10.5303/jkas.2019.52.1.23
复制
发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Guangyao Zhao;T. Jung;B. Sohn;M. Kino;M. Honma;R. Dodson;M. Rioja;Seog-Tae Han;K. Shibata;D. Byun;K. Akiyama;J. Algaba;T. An;Xiaopeng Cheng;I. Cho;Yuzhu Cui;K. Hada;J. Hodgson;Wu Jiang;J. Lee;J. Lee;K. Niinuma;Jongho Park;H. Ro;S. Sawada-Satoh;Zhi-qiang Shen;F. Tazaki;S. Trippe;K. Wajima;Yingkang Zhang
中科院分区：
文献类型：
--
作者：
Guangyao Zhao;T. Jung;B. Sohn;M. Kino;M. Honma;R. Dodson;M. Rioja;Seog-Tae Han;K. Shibata;D. Byun;K. Akiyama;J. Algaba;T. An;Xiaopeng Cheng;I. Cho;Yuzhu Cui;K. Hada;J. Hodgson;Wu Jiang;J. Lee;J. Lee;K. Niinuma;Jongho Park;H. Ro;S. Sawada-Satoh;Zhi-qiang Shen;F. Tazaki;S. Trippe;K. Wajima;Yingkang Zhang
KVN（Korean VLBI Network）式的同时多频接收模式被证明是有希望的毫米VLBI观测。近年来，地球仪上的其他甚长基线干涉测量（VLBI）装置也开始采用兼容的光学系统。因此，利用国际基线在毫米波长上同时进行双频/多频VLBI观测是可能的。本文介绍了首次成功的22/43 GHz KVA双频同步观测的结果，包括图像和天体测量结果。我们的分析表明，新实施的同步接收系统带来了一个显着的延长的相干时间的43 GHz的能见度相位沿着国际基线。用KaVA得到的天体测量结果与KVN数据的独立分析得到的结果是一致的。因此，我们的结果证实了良好的性能的同时接收系统的非KVN站。未来与更多的全球站同时进行的观测将带来更高的灵敏度和对目标的微弧秒级天体测量。
The KVN(Korean VLBI Network)-style simultaneous multi-frequency receiving mode is demonstrated to be promising for mm-VLBI observations. Recently, other Very long baseline interferometry (VLBI) facilities all over the globe start to implement compatible optics systems. Simultaneous dual/multi-frequency VLBI observations at mm wavelengths with international baselines are thus possible. In this paper, we present the results from the first successful simultaneous 22/43 GHz dual-frequency observation with KaVA(KVN and VERA array), including images and astrometric results. Our analysis shows that the newly implemented simultaneous receiving system has brought a significant extension of the coherence time of the 43 GHz visibility phases along the international baselines. The astrometric results obtained with KaVA are consistent with those obtained with the independent analysis of the KVN data. Our results thus confirm the good performance of the simultaneous receiving systems for the non-KVN stations. Future simultaneous observations with more global stations bring even higher sensitivity and micro-arcsecond level astrometric measurements of the targets.