Mark-III VLBI astrometry of pulsars

Dayton L. Jones, Rachel J. Dewey, Carl R. Gwinn, Michael M. Davis
1991 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 radio
more » ... erometric position measurements of PSR 1937+214. Our results illustrate the value of combining the large collecting area of the Arecibo telescope with the Mk-III VLBI recording system.
doi:10.1017/s0252921100013610 fatcat:whefr4tmjrdrfnj6u2nfy3vgm4