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Phase-referenced VLBA Observations of PSRs B1937+21 and B0329+54
Published online by Cambridge University Press: 12 April 2016
Extract
In this paper we present the preliminary results of phase-referenced VLBA observations of two pulsars PSRB1937+21 and PSRB0329+54. Since pulsar observations usually require a lower observing frequency than that used for other astrometric applications, ionospheric delays are a significant source of systematic error. For the observations presented here we used total-electron-content (TEC) measurements derived from dual-frequency GPS observations (Wilson, Mannucci & Edwards, 1995) to calibrate ionospheric delays.
Using this calibration technique were able to obtain positions for these two pulsars which we believe to be accurate to approximately 2 mas in each coordinate. With this level of accuracy we expect astrometric pulsar observations to be able to address a variety of interesting issues ranging from reference frame alignment and fundamental astrometry to the origin of pulsar velocities.
- Type
- Part 2 Precision Measurements
- Information
- International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 115 - 116
- Copyright
- Copyright © Astronomical Society of the Pacific 1996