Pulsar Time Scale: Pulsar VLBI Experiment For Precise Astrometry and Reference Frame Tie

Details Pulsar Time Scale: Pulsar VLBI Experiment For Precise Astrometry and Reference Frame Tie Pulsar Time Scale: Pulsar VLBI Experiment For Precise Astrometry and Reference Frame Tie

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999crlrv..45..137s&link_type=abstract

Review of the Communications Research Laboratory, vol. 45, p. 137

Astronomy and Astrophysics

Astronomy

Very Long Base Interferometry, Pulsars, Astrometry, Celestial Reference Systems, Time Measurement, Planet Ephemerides, Correlation, Interferometers

Scientific paper

VLBI is the most precise method of measuring radio source positions. Pulsar VLBI measurement enables one to tie an extra-galactic reference frame to the planetary ephemeris by comparing the position measured by VLBI with that measured by pulsar timing, because pulsars are one of the few kinds of object whose positions can be measured precisely in both coordinate systems. We are conducting astrometric pulsar VLBI observations with the Lebedev Physical Institute of Russia. The purpose is precise measurement of pulsar positions and proper motions. From experiments in March 1995 and May 1996, we successfully measured the position and proper motion of PSR0329+54. The results were consistent with the interferometric measurement position reported by N. Bartel et al. (1985) and proper motion by P.A. Harrison et al. (1993). We concluded that the discrepancy between position measured by interferometer and that measured by pulsar timing is mainly due to large pulsar timing noise of PSR0329+54.

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