Astrometry of 59 Pulsars: A Comparison of Interferometric and Timing Positions

Details Astrometry of 59 Pulsars: A Comparison of Interferometric and Timing Positions Astrometry of 59 Pulsars: A Comparison of Interferometric and Timing Positions

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..113f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Sept. 1, 1984, p. 113-130.

Astronomy and Astrophysics

Astronomy

21

Astrometry, Pulsars, Pulse Rate, Radio Interferometers, Astronomical Maps, Time Measurement

Scientific paper

Using the VLA, positions have been measured for 58 pulsars which also have accurate estimates of position based on pulse arrival times. Estimated errors in the VLA positions are typically 0.2 arcsec and are comparable with the errors in positions obtained from the pulse timing analyses. Agreement between the VLA and timing positions is generally good, although systematic discrepancies at the 0.2-0.5 arcsec level are observed. Timing positions based on an MIT ephemeris differ systematically by about 0.2 arcsec from positions based on a JPL ephemeris. A systematic variation of Delta alpha cos delta with right ascension alpha between the VLA and both the MIT and JPL timing positions is observed. No explanation for this latter discrepancy can be offered.

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