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Pulsar Astrometry at the Microarcsecond Level
W. H. T. Vlemmings, S. Chatterjee, W. F. Brisken +12
Determination of pulsar parallaxes and proper motions addresses fundamental astrophysical questions. We have recently finished a VLBI astrometry project to determine the proper mot…
VLBA Measurement of Nine Pulsar Parallaxes
Walter F. Brisken, John M. Benson, W. M. Goss +1
We determined the distances to nine pulsars by parallax measurements using the NRAO Very Long Baseline Array, doubling the number of pulsars with accurate distance measurements. Br…
The Structure and Motions of the 3C~120 Radio Jet on Scales of 0.6 to 300 Parsecs
R. C. Walker, J. M. Benson, S. C. Unwin +4
Results are presented from long term VLBI monitoring of the parsec-scale radio jet in 3C120, primarily at 5 and 1.7 GHz. Numerous superluminal features are followed, some over larg…
Parallax and Kinematics of PSR B0919+06 from VLBA Astrometry and Interstellar Scintillometry
S. Chatterjee, J. M. Cordes, T. J. W. Lazio +3
Results are presented from a long-term astrometry program on PSR B0919+06 using the NRAO Very Long Baseline Array. With ten observations (seven epochs) between 1994--2000, we measu…
Measurement of the Parallax of PSR B0950+08 Using the VLBA
Walter F. Brisken, John M. Benson, A. J. Beasley +3
A new technique has been developed to remove the ionosphere's distorting effects from low frequency VLBI data. By fitting dispersive and non-dispersive components to the phases of…