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Reduction of Schmidt Photographs with the Aid of Reference Marks on the Curved Plate

Published online by Cambridge University Press:  14 August 2015

P. Lacroute
P. Lacroute*
Affiliation:
Strasbourg Observatory, France

Abstract

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A method is proposed for improving the astrometric accuracy obtainable from curved-field Schmidt plates. A reseau of small crosses in a 10 mm-spaced rectangular grid is imposed on the plate while still curved in its holder. The reseau is calibrated by photography of a field of reference stars with known positions. The method eliminates the troublesome errors arising from uncertainty in the nature of deformation of the curved plates.

Type
Session D: Astrometry with Large Telescopes
Information
Symposium - International Astronomical Union , Volume 61: New Problems in Astrometry , 1974 , pp. 181
Copyright
Copyright © Reidel 1974