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- Title
Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations.
- Authors
Jiang, Wu; Zhao, Guang-Yao; Shen, Zhi-Qiang; Rioja, María J.; Dodson, Richard; Cho, Ilje; Zhao, Shan-Shan; Eubanks, Marshall; Lu, Ru-Sen
- 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.
- Subjects
ACCESS to information; ANTENNAS (Electronics); ASTROMETRY; TELESCOPES; BLACK holes
- Publication
Galaxies (2075-4434), 2023, Vol 11, Issue 1, p3
- ISSN
2075-4434
- Publication type
Article
- DOI
10.3390/galaxies11010003