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http://dx.doi.org/10.5303/JKAS.2019.52.1.23

SOURCE-FREQUENCY PHASE-REFERENCING OBSERVATION OF AGNS WITH KAVA USING SIMULTANEOUS DUAL-FREQUENCY RECEIVING  

Zhao, Guang-Yao (Korea Astronomy and Space Science Institute)
Jung, Taehyun (Korea Astronomy and Space Science Institute)
Sohn, Bong Won (Korea Astronomy and Space Science Institute)
Kino, Motoki (Kogakuin University, Academic Support Center)
Honma, Mareki (National Astronomical Observatory of Japan)
Dodson, Richard (ICRAR, M468, University of Western Australia)
Rioja, Maria (ICRAR, M468, University of Western Australia)
Han, Seog-Tae (Korea Astronomy and Space Science Institute)
Shibata, Katsunori (National Astronomical Observatory of Japan)
Byun, Do-Young (Korea Astronomy and Space Science Institute)
Akiyama, Kazunori (Massachusetts Institute of Technology, Haystack Observatory)
Algaba, Juan-Carlos (Department of Physics and Astronomy, Seoul National University)
An, Tao (Shanghai Astronomical Observatory, Chinese Academy of Sciences)
Cheng, Xiaopeng (Shanghai Astronomical Observatory, Chinese Academy of Sciences)
Cho, Ilje (Korea Astronomy and Space Science Institute)
Cui, Yuzhu (National Astronomical Observatory of Japan)
Hada, Kazuhiro (National Astronomical Observatory of Japan)
Hodgson, Jeffrey A. (Korea Astronomy and Space Science Institute)
Jiang, Wu (Shanghai Astronomical Observatory, Chinese Academy of Sciences)
Lee, Jee Won (Korea Astronomy and Space Science Institute)
Lee, Jeong Ae (Department of Physics and Astronomy, Seoul National University)
Niinuma, Kotaro (Graduate School of Sciences and Technology for Innovation, Yamaguchi University)
Park, Jong-Ho (Department of Physics and Astronomy, Seoul National University)
Ro, Hyunwook (Department of Astronomy, Yonsei University)
Sawada-Satoh, Satoko (Graduate School of Science and Engineering, Kagoshima University)
Shen, Zhi-Qiang (Shanghai Astronomical Observatory, Chinese Academy of Sciences)
Tazaki, Fumie (National Astronomical Observatory of Japan)
Trippe, Sascha (Department of Physics and Astronomy, Seoul National University)
Wajima, Kiyoaki (Korea Astronomy and Space Science Institute)
Zhang, Yingkang (Shanghai Astronomical Observatory, Chinese Academy of Sciences)
Publication Information
Journal of The Korean Astronomical Society / v.52, no.1, 2019 , pp. 23-30 More about this Journal
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 nonKVN stations. Future simultaneous observations with more global stations bring even higher sensitivity and micro-arcsecond level astrometric measurements of the targets.
Keywords
galaxies: active; galaxies: individual: 4C 39.25, 0945+408; astrometry; techniques: interferometric;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Algaba, J.-C., Zhao, G.-Y., Lee, S.-S., et al. 2015, Interferometric Monitoring of Gamma-Ray Bright Active Galactic Nuclei II: Frequency Phase Transfer, JKAS, 48, 237
2 Beasley, A. J., & Conway, J. E. 1995, VLBI Phase-Referencing, Very Long Baseline Interferometry and the VLBA, 82, 327
3 Blandford, R. D., & Konigl, A. 1979, Relativistic Jets as Compact Radio Sources, ApJ, 232, 34   DOI
4 Dodson, R., Rioja, M. J., Jung, T., et al. 2014, Astrometrically Registered Simultaneous Observations of the 22 GHz $H_2O$ and 43 GHz SiO Masers toward R Leonis Minoris Using KVN and Source/Frequency Phase Referencing, AJ, 148, 97   DOI
5 Dodson, R., Rioja, M. J., Jung, T., et al. 2017, The Science Case for Simultaneous mm-Wavelength Receivers in Radio Astronomy, NewAR, 79, 85   DOI
6 Dodson, R., Rioja, M., Bujarrabal, V., et al. 2018, Registration of $H_2O$ and SiO Masers in the Calabash Nebula to Confirm the Planetary Nebula Paradigm, MNRAS, 476, 520   DOI
7 Han, S.-T., Lee, J.-W., Kang, J., et al. 2008, Millimeter-Wave Receiver Optics for Korean VLBI Network, IJIMW, 29, 69
8 Han, S.-T., Lee, J.-W., Kang, J., et al. 2013, Korean VLBI Network Receiver Optics for Simultaneous Multifrequency Observation: Evaluation, PASP, 125, 539   DOI
9 Jiang, W., Shen, Z., Jiang, D., et al. 2018, VLBI Imaging of M81* at $\lambda$ = 3.4 mm with Source-Frequency Phase-Referencing, ApJL, 853, 14   DOI
10 Jung, T., Sohn, B. W., Kobayashi, H., et al. 2011, First Simultaneous Dual-Frequency Phase Referencing VLBI Observation with VERA, PASJ, 63, 375   DOI
11 Jung, T., Dodson, R., Han, S.-T., et al. 2015, Measuring the Core Shift Effect in AGN Jets with the Extended Korean VLBI Network, JKAS, 48, 277
12 Jung, T., et al. 2019, JKAS, in preperation.
13 Lee, S.-S., Oh, C. S., Roh, D. G., et al. 2015a, A New Hardware Correlator in Korea: Performance Evaluation Using KVN Observations, JKAS, 48, 125
14 Lee, S.-S., Byun, D.-Y., Oh, C. S., et al. 2015b, Amplitude Correction Factors of Korean VLBI Network Observations, JKAS, 48, 229
15 Lister, M. L., Aller, M. F., Aller, H. D., et al. 2013, MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in Active Galactic Nuclei, AJ, 146, 120   DOI
16 Middelberg, E., Roy, A. L., Walker, R. C., & Falcke, H. 2005, VLBI Observations ofWeak Sources Using Fast Frequency Switching, A&A, 433, 897   DOI
17 Niinuma, K., Lee, S.-S., Kino, M., et al. 2014, VLBI Observations of Bright AGN Jets with the KVN and VERA Array (KaVA): Evaluation of Imaging Capability, PASJ 66, 103   DOI
18 Rioja, M., & Dodson, R. 2011, High-Precision Astrometric Millimeter Very Long Baseline Interferometry Using a New Method for Atmospheric Calibration, AJ, 141, 114   DOI
19 Rioja, M., Dodson, R., Jung, T. H., et al., 2014, Verification of the Astrometric Performance of the Korean VLBI Network, Using Comparative SFPR Studies with the VLBA at 14/7 mm, AJ, 148, 84   DOI
20 Rioja, M., Dodson, R., Asaki, Y., et al. 2012, The Impact of Frequency Standards on Coherence in VLBI at the Highest Frequencies, AJ, 144, 121   DOI
21 Rioja, M. J., Dodson, R., Jung, T., & Sohn, B. W. 2015, The Power of Simultaneous Multifrequency Observations for mm-VLBI: Astrometry up to 130 GHz with the KVN, AJ, 150, 202   DOI
22 Yoon, D.-H., Cho, S.-H., Yun, Y., et al. 2018, Astrometrically Registered Maps of $H_2O$ and SiO Masers toward VX Sagittarii, Nature Communications, 9, 2534   DOI
23 Zhao, G.-Y., Algaba, J. C., Lee, S. S., et al. 2018, The Power of Simultaneous Multi-Frequency Observations for mm-VLBI: Beyond Frequency Phase Transfer, AJ, 155, 26
24 Zhao, G.-Y., Jung, T., Dodson, R., Rioja, M., & Sohn, B. W. 2015, KVN Source-Frequency Phase-Referencing Observation of 3c 66A and 3c 66B, PKAS, 30, 629
25 Kino, M., Niinuma, K., Zhao, G.-Y., et al. 2015, Key Science Observations of AGNs with KaVA Array, PKAS, 30, 633