Astrometry with small telescopes
نویسندگان
چکیده
منابع مشابه
Chromaticity in all-reflective telescopes for astrometry
Aims. Chromatic effects are usually associated with refractive optics, so reflective telescopes are assumed to be free from them. We show that all-reflective optics still bears significant levels of such perturbations, which is especially critical to modern micro-arcsecond astrometric experiments. Methods. We analyze the image formation and measurement process to derive a precise definition of ...
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We discuss the use of the block adjustment method for determining astrometric positions from a mosaic of CCD frames taken with a long focus reflector telescope. The observations cover an area of 25 × 25 around the open cluster Rup21. The source of reference positions was the Tycho-2 Catalogue. The internal error in the measured positions is analyzed, and the external error is estimated from com...
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In recent years there has been a trend toward the automation of modest sized observatories, especially those involved with photoelectric photometry. Although undoubtedly useful, there is clearly a need for more advanced instrumentation such as spectrographs. The relatively small telescope sizes places severe limits on the choice of spectrograph configuration. A fiber-fed echelle spectrograph is...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1986
ISSN: 0074-1809
DOI: 10.1017/s0074180900151666