Review of CCD Parallax Measurements
Several groups, using 1-m to 2-m telescopes on ‘visitor’ arrangements, have employed CCDs to measure stellar trigonometric parallaxes with precisions in the range ±2–5 mas. More intensive observing efforts now routinely achieve sub-mas results with the best obtained to date in the ±0.3–0.5 mas range. Selective dimming of bright target stars using neutral density spots now permit CCD parallax measures of stars as bright as R~4.
KeywordsFlare Star Faint Star Trigonometric Parallax Astronomical Community Target Star
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- Hawkins, M.R.S., Ducourant, C., Jones, H.R.A., and Rapaport, M. 1996, MNRAS, submitted.Google Scholar