Pulsar Parallaxes at 5 GHz with the Very Long Baseline Array

  title={Pulsar Parallaxes at 5 GHz with the Very Long Baseline Array},
  author={Shami Chatterjee and James M. Cordes and Wouter H. T. Vlemmings and Zaven Arzoumanian and W. M. Goss and Technical University and Nrao and Usra and Nrl},
  journal={The Astrophysical Journal},
We present the first pulsar parallaxes measured with phase-referenced pulsar VLBI observations at 5 GHz. Because of the steep spectra of pulsars, previous astrometric measurements have been at lower frequencies. However, the strongest pulsars can be observed at 5 GHz, offering the benefit of lower combined ionospheric and tropospheric phase errors, which usually limit VLBI astrometric accuracy. The pulsars B0329+54, B0355+54, and B1929+10 were observed for seven epochs spread evenly over 2… Expand

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