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Mark-III VLBI astrometry of pulsars
International Astronomical Union Colloquium
AbstractDifferential 18-cm VLBI measurements of the position of PSR 1937+214 with respect to the quasar 1923+210 have been made to improve our knowledge of the offset between the planetary ephemeris reference frame and the extragalactic radio reference frame. Our preliminary frame-tie result (VLBI – Timing position) is +21 ± 2 milli-arcseconds in right ascension and +14 ± 9 milli-arcseconds in declination. We describe the data analysis methods used and compare our results with other radiodoi:10.1017/s0252921100013610 fatcat:whefr4tmjrdrfnj6u2nfy3vgm4