Positions and proper motions of pulsars

Details Positions and proper motions of pulsars Positions and proper motions of pulsars

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.258..497f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 258, no. 3, p. 497-510.

Astronomy and Astrophysics

Astronomy

80

Astrometry, Position (Location), Pulsars, Radio Stars, Stellar Motions, Interferometry, Milky Way Galaxy, Reference Stars, Very Large Array (Vla)

Scientific paper

We have determined accurate radio positions for 40 pulsars using the VLA. Nineteen of these pulsars were observed at three epochs, 1984.98, 1986.39, and 1989.08, from which proper motions have been obtained with an accuracy between than 0.01 arcsec per year for the stronger pulsars. Absolute positions have a precisions of a few tenths of an arcsecond or better and, after correcting for known proper motions, are in excellent agreement with positions derived from pulsar timing onservations. The weighted mean offset between the VLA and timing frames is only 0.02 arcsec. Proper motions have also been determined for 21 pulsars from a comparison of the VLA positions with previously published positions. Where independent determinations of proper motions are available, they generally agree within twice the estimated errors but there are few notable exceptions. Pulsar transverse velocities derived from new proper motion determinations are, on average, somewhat higher than those found previously, but lie within the previously observed range.

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