Source-Frequency Phase-Referencing Observation of AGNs with KaVA Using Simultaneous Dual-Frequency Receiving
Abstract
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.
Cite
@article{arxiv.1903.11796,
title = {Source-Frequency Phase-Referencing Observation of AGNs with KaVA Using Simultaneous Dual-Frequency Receiving},
author = {Guang-Yao Zhao and Taehyun Jung and Bong Won Sohn and Motoki Kino and Mareki Honma and Richard Dodson and Maria Rioja and Seog-Tae Han and Katsunori Shibata and Do-Young Byun and Kazunori Akiyama and Juan-Carlos Algaba and Tao An and Xiaopeng Cheng and Ilje Cho and Yuzhu Cui and Kazuhiro Hada and Jeffrey A. Hodgson and Wu Jiang and Jee Won Lee and Jeong Ae Lee and Kotaro Niinuma and Jongho Park and Hyunwook Ro and Satoko Sawada-Satoh and Zhi-Qiang Shen and Fumie Tazaki and Sascha Trippe and Kiyoaki Wajima and Yingkang Zhang},
journal= {arXiv preprint arXiv:1903.11796},
year = {2019}
}
Comments
8 pages, 6 figures, Published in JKAS