VLBA Measurement of Nine Pulsar Parallaxes

Abstract

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. Broadband phase modeling was used to calibrate the varying dispersive effects of the ionosphere and remove the resulting phase errors from the phase-referenced VLBI data. The resulting parallaxes have a typical accuracy of 100 microarcseconds or better, yielding distances measurements as accurate as 2%. We also report new proper motion measurements of these pulsars, accurate to 0.4 mas per year or better.

36 pages, Latex, 15 figures. Accepted for publication in ApJ, 2002 June 1

References in corpus (1)

• The distance to the Vela pulsar gauged with HST parallax oservations

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