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Some Results of CCD-Camera Based Astrometric Plate Measurements

Published online by Cambridge University Press:  26 July 2016

N. Zacharias ,
C. de Vegt ,
L. Winter  and
W. Weneit
N. Zacharias
Affiliation:
U.S. Naval Observatory, 3450 Mass. Av. NW., Washington D.C. 20392-5400, U.S.A.
C. de Vegt
Affiliation:
Hamburger Sternwarte, Gojenbergsweg 112, W-2050 Hamburg 80, Germany
L. Winter
Affiliation:
Hamburger Sternwarte, Gojenbergsweg 112, W-2050 Hamburg 80, Germany
W. Weneit
Affiliation:
Hamburger Sternwarte, Gojenbergsweg 112, W-2050 Hamburg 80, Germany

Abstract

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A measuring accuracy of about 0.3 μm per coordinate for well exposed stellar images is achieved over the entire usable measuring area of more than 200 × 200 mm2 with the CCD-camera upgrade of the ‘old’ Mann comparator.

The external plate-to-plate comparison shows that the error due to emulsion shifts dominates, which results in an overall accuracy of about 0.8 μm.

Type
Part Six: Calibration: Astrometric and Photometric
Information
Symposium - International Astronomical Union , Volume 161: Astronomy from Wide-Field Imaging , 1994 , pp. 285 - 287
Copyright
Copyright © Kluwer 1994