VLBI Techniques in Pulsar Astronomy

Details VLBI Techniques in Pulsar Astronomy VLBI Techniques in Pulsar Astronomy

2002-10-30

arxiv.org/abs/astro-ph/0210661v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, to appear in ASP Conf. Ser., Radio Pulsars, ed. M. Bailes, D. J. Nice, & S. E. Thorsett (proceedings of Au

Scientific paper

Very long baseline interferometry (VLBI) provides the resolution needed to make precision measurements of a pulsar's parallax and proper motion. In making these measurements, the astronomer is faced with difficult calibration problems and a paucity of strong point-like calibrators that ultimately limit the accuracy of parallax measurements of even the brightest pulsars. A new technique to calibrate away the effects of the ionosphere, the dominant source of phase error at frequencies below 5 GHz, has led to the new measurements of nine pulsar parallaxes to 100 microarcsecond or better precision.

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