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Trigonometric Parallaxes Obtained with the UK Schmidt Telescope
Published online by Cambridge University Press: 04 August 2017
Abstract
In continuation of a long term programme of measurement of parallaxes and proper motions in the South Galactic Cap from plates taken with the UK Schmidt Telescope and measured in GALAXY at RGO, data for some 800 red stars brighter than B = 17.5 have been derived from two independent plate series. The parallaxes obtained from unfiltered IIaO plates show a large systematic error depending on magnitude compared with those obtained from IIaD plates with GG 495 filter. After correction, the combined trigonometric parallaxes show very satisfactory agreement with photometric parallaxes, and the average r.m.s. error of a combined parallax is found to be about ±0″.012 both from internal and external evidence.
- Type
- III. Photographic Astrometry
- Information
- Symposium - International Astronomical Union , Volume 109: Astrometric Techniques , 1986 , pp. 213 - 221
- Copyright
- Copyright © Reidel 1986