Source-frequency phase-referencing observation of AGNs with kava using simultaneous dual-frequency receiving

Guang Yao Zhao; Taehyun Jung; Bong Won Sohn; Motoki Kino; Mareki Honma; Richard Dodson; María Rioja; Seog Tae Han; Katsunori Shibata; Do Young Byun; Kazunori Akiyama; Juan Carlos Algaba; Tao An; Xiaopeng Cheng; Ilje Cho; Yuzhu Cui; Kazuhiro Hada; Jeffrey A. Hodgson; Wu Jiang; Jee Won Lee; Jeong Ae Lee; Kotaro Niinuma; Jong Ho Park; Hyunwook Ro; Satoko Sawada-Satoh; Zhi Qiang Shen; Fumie Tazaki; Sascha Trippe; Kiyoaki Wajima; Yingkang Zhang

doi:10.5303/JKAS.2019.52.1.23

Source-frequency phase-referencing observation of AGNs with kava using simultaneous dual-frequency receiving

Guang Yao Zhao, Taehyun Jung, Bong Won Sohn, Motoki Kino, Mareki Honma, Richard Dodson, María Rioja, Seog Tae Han, Katsunori Shibata, Do Young Byun, Kazunori Akiyama, Juan Carlos Algaba, Tao An, Xiaopeng Cheng, Ilje Cho, Yuzhu Cui, Kazuhiro Hada, Jeffrey A. Hodgson, Wu Jiang, Jee Won LeeJeong Ae Lee, Kotaro Niinuma, Jong Ho Park, Hyunwook Ro, Satoko Sawada-Satoh, Zhi Qiang Shen, Fumie Tazaki, Sascha Trippe, Kiyoaki Wajima, Yingkang Zhang

Department of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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.

Original language	English
Pages (from-to)	23-30
Number of pages	8
Journal	Journal of the Korean Astronomical Society
Volume	52
Issue number	1
DOIs	https://doi.org/10.5303/JKAS.2019.52.1.23
State	Published - 2019

Bibliographical note

Publisher Copyright:
© 2019, Korean Astronomical Society. All rights reserved.

Keywords

4C 39.25, 0945+408 — astrometry — techniques
Active — galaxies
Galaxies
Individual
Interferometric

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10.5303/JKAS.2019.52.1.23

Cite this

Zhao, G. Y., Jung, T., Sohn, B. W., Kino, M., Honma, M., Dodson, R., Rioja, M., Han, S. T., Shibata, K., Byun, D. Y., Akiyama, K., Algaba, J. C., An, T., Cheng, X., Cho, I., Cui, Y., Hada, K., Hodgson, J. A., Jiang, W., ... Zhang, Y. (2019). Source-frequency phase-referencing observation of AGNs with kava using simultaneous dual-frequency receiving. Journal of the Korean Astronomical Society, 52(1), 23-30. https://doi.org/10.5303/JKAS.2019.52.1.23

@article{a7326a6a0edc45bdb9fc8be98af12837,

title = "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.",

keywords = "4C 39.25, 0945+408 — astrometry — techniques, Active — galaxies, Galaxies, Individual, Interferometric",

author = "Zhao, {Guang Yao} and Taehyun Jung and Sohn, {Bong Won} and Motoki Kino and Mareki Honma and Richard Dodson and Mar{\'i}a Rioja and Han, {Seog Tae} and Katsunori Shibata and Byun, {Do Young} and Kazunori Akiyama and Algaba, {Juan Carlos} and Tao An and Xiaopeng Cheng and Ilje Cho and Yuzhu Cui and Kazuhiro Hada and Hodgson, {Jeffrey A.} and Wu Jiang and Lee, {Jee Won} and Lee, {Jeong Ae} and Kotaro Niinuma and Park, {Jong Ho} and Hyunwook Ro and Satoko Sawada-Satoh and Shen, {Zhi Qiang} and Fumie Tazaki and Sascha Trippe and Kiyoaki Wajima and Yingkang Zhang",

year = "2019",

doi = "10.5303/JKAS.2019.52.1.23",

language = "English",

volume = "52",

pages = "23--30",

journal = "Journal of the Korean Astronomical Society",

issn = "1225-4614",

publisher = "Korean Astronomical Society",

number = "1",

}

Zhao, GY, Jung, T, Sohn, BW, Kino, M, Honma, M, Dodson, R, Rioja, M, Han, ST, Shibata, K, Byun, DY, Akiyama, K, Algaba, JC, An, T, Cheng, X, Cho, I, Cui, Y, Hada, K, Hodgson, JA, Jiang, W, Lee, JW, Lee, JA, Niinuma, K, Park, JH, Ro, H, Sawada-Satoh, S, Shen, ZQ, Tazaki, F, Trippe, S, Wajima, K & Zhang, Y 2019, 'Source-frequency phase-referencing observation of AGNs with kava using simultaneous dual-frequency receiving', Journal of the Korean Astronomical Society, vol. 52, no. 1, pp. 23-30. https://doi.org/10.5303/JKAS.2019.52.1.23

TY - JOUR

T1 - Source-frequency phase-referencing observation of AGNs with kava using simultaneous dual-frequency receiving

AU - Zhao, Guang Yao

AU - Jung, Taehyun

AU - Sohn, Bong Won

AU - Kino, Motoki

AU - Honma, Mareki

AU - Dodson, Richard

AU - Rioja, María

AU - Han, Seog Tae

AU - Shibata, Katsunori

AU - Byun, Do Young

AU - Akiyama, Kazunori

AU - Algaba, Juan Carlos

AU - An, Tao

AU - Cheng, Xiaopeng

AU - Cho, Ilje

AU - Cui, Yuzhu

AU - Hada, Kazuhiro

AU - Hodgson, Jeffrey A.

AU - Jiang, Wu

AU - Lee, Jee Won

AU - Lee, Jeong Ae

AU - Niinuma, Kotaro

AU - Park, Jong Ho

AU - Ro, Hyunwook

AU - Sawada-Satoh, Satoko

AU - Shen, Zhi Qiang

AU - Tazaki, Fumie

AU - Trippe, Sascha

AU - Wajima, Kiyoaki

AU - Zhang, Yingkang

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - 4C 39.25, 0945+408 — astrometry — techniques

KW - Active — galaxies

KW - Galaxies

KW - Individual

KW - Interferometric

UR - http://www.scopus.com/inward/record.url?scp=85077555363&partnerID=8YFLogxK

U2 - 10.5303/JKAS.2019.52.1.23

DO - 10.5303/JKAS.2019.52.1.23

M3 - Article

AN - SCOPUS:85077555363

SN - 1225-4614

VL - 52

SP - 23

EP - 30

JO - Journal of the Korean Astronomical Society

JF - Journal of the Korean Astronomical Society

IS - 1

ER -

Source-frequency phase-referencing observation of AGNs with kava using simultaneous dual-frequency receiving

Abstract

Bibliographical note

Keywords

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