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| Paper: |
Are the Band Width Synthesis delay and delay rate observables useful for VLBI imaging? |
| Volume: |
19, Radio Interferometry: Theory, Techniques, and Applications, IAU Colloquium 131 |
| Page: |
302 |
| Authors: |
Charlot, P. |
| Abstract: |
The Band Width Synthesis (BWS) delay and delay rate observables measured by VLBI are used in astrometry to determine positions of extragalactic radio sources with a precision of 0.001 arcsec. At this level of precision, extragalactic radio sources exhibit extended structures that induce significant effects in the measured BWS delays and delay rates. The question whether closure BWS delays and delay rates could supplement the amplitudes and closure phases for VLBI imaging is studied. Preliminary results for the radio source NRAO140 observed in July 1983 are presented. |
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