Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations

Wu Jiang; Guang Yao Zhao; Zhi Qiang Shen; María J. Rioja; Richard Dodson; Ilje Cho; Shan Shan Zhao; Marshall Eubanks; Ru Sen Lu

doi:10.3390/galaxies11010003

Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations

Wu Jiang
, Guang Yao Zhao
, Zhi Qiang Shen
, María J. Rioja
, Richard Dodson
, Ilje Cho
, Shan Shan Zhao
, Marshall Eubanks
, Ru Sen Lu

International Centre for Radio Astronomy Research (ICRAR)

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

12 Citations (Scopus)

Abstract

The source-frequency phase-referencing (SFPR) technique has been demonstrated to have great advantages for mm-VLBI observations. By implementing simultaneous multi-frequency receiving systems on the next-generation Event Horizon Telescope (ngEHT) antennas, it is feasible to carry out a frequency phase transfer (FPT) which could calibrate the non-dispersive propagation errors and significantly increase the phase coherence in the visibility data. Such an increase offers an efficient approach for a weak source or structure detection. The SFPR also makes it possible for high-precision astrometry, including the core-shift measurements up to sub-mm wavelengths for Sgr A*, M 87*, etc. We also briefly discuss the technical and scheduling considerations for future SFPR observations with the ngEHT.

Original language	English
Article number	3
Journal	Galaxies
Volume	11
Issue number	1
DOIs	https://doi.org/10.3390/galaxies11010003
Publication status	Published - Feb 2023

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10.3390/galaxies11010003Licence: CC BY

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title = "Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations",

abstract = "The source-frequency phase-referencing (SFPR) technique has been demonstrated to have great advantages for mm-VLBI observations. By implementing simultaneous multi-frequency receiving systems on the next-generation Event Horizon Telescope (ngEHT) antennas, it is feasible to carry out a frequency phase transfer (FPT) which could calibrate the non-dispersive propagation errors and significantly increase the phase coherence in the visibility data. Such an increase offers an efficient approach for a weak source or structure detection. The SFPR also makes it possible for high-precision astrometry, including the core-shift measurements up to sub-mm wavelengths for Sgr A*, M 87*, etc. We also briefly discuss the technical and scheduling considerations for future SFPR observations with the ngEHT.",

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T1 - Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations

AU - Jiang, Wu

AU - Zhao, Guang Yao

AU - Shen, Zhi Qiang

AU - Rioja, María J.

AU - Dodson, Richard

AU - Cho, Ilje

AU - Zhao, Shan Shan

AU - Eubanks, Marshall

AU - Lu, Ru Sen

PY - 2023/2

Y1 - 2023/2

N2 - The source-frequency phase-referencing (SFPR) technique has been demonstrated to have great advantages for mm-VLBI observations. By implementing simultaneous multi-frequency receiving systems on the next-generation Event Horizon Telescope (ngEHT) antennas, it is feasible to carry out a frequency phase transfer (FPT) which could calibrate the non-dispersive propagation errors and significantly increase the phase coherence in the visibility data. Such an increase offers an efficient approach for a weak source or structure detection. The SFPR also makes it possible for high-precision astrometry, including the core-shift measurements up to sub-mm wavelengths for Sgr A*, M 87*, etc. We also briefly discuss the technical and scheduling considerations for future SFPR observations with the ngEHT.

AB - The source-frequency phase-referencing (SFPR) technique has been demonstrated to have great advantages for mm-VLBI observations. By implementing simultaneous multi-frequency receiving systems on the next-generation Event Horizon Telescope (ngEHT) antennas, it is feasible to carry out a frequency phase transfer (FPT) which could calibrate the non-dispersive propagation errors and significantly increase the phase coherence in the visibility data. Such an increase offers an efficient approach for a weak source or structure detection. The SFPR also makes it possible for high-precision astrometry, including the core-shift measurements up to sub-mm wavelengths for Sgr A*, M 87*, etc. We also briefly discuss the technical and scheduling considerations for future SFPR observations with the ngEHT.

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KW - black hole

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KW - VLBI

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DO - 10.3390/galaxies11010003

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ER -

Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations

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