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Are the bandwidth synthesis delay and delay rate observables useful for VLBI imaging?
1991
International Astronomical Union Colloquium
Preserved Fulltext
AbstractThe 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". 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.
doi:10.1017/s0252921100013518
fatcat:zk3nr2qy6be75pvv5awufe32gu