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Optimized Model-Functions for CCD-Camera Based Astrometric Plate Measurements
Published online by Cambridge University Press: 26 July 2016
Abstract
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While digitizing the first 1500 photographic plates (astrograph plates and prime focus plates of various telescopes) using our CCD-based measuring machine, we gained a detailed understanding of the properties of the digitized stellar images. These images are different from those obtained by digitizing photographic plates with microdensitometers and similar scanners. Therefore it was necessary to reject the modelling methods given in the literature and compose new models that describe the stellar images more accurately.
First results of simulating the whole imaging process, starting with the atmosphere, aberrations of the telescope, etc., and ending by including the imaging-properties of our measuring machine, show good agreement with the measured images as well as the modelling functions.
- Type
- Part Six: Calibration: Astrometric and Photometric
- Information
- Symposium - International Astronomical Union , Volume 161: Astronomy from Wide-Field Imaging , 1994 , pp. 288 - 290
- Copyright
- Copyright © Kluwer 1994
References
Moffat, A.F.J., 1969. ‘Theoretical investigation of focal stellar images in the photographic emulsion and application to photographic photometry’, Astron. & Astrophys., 3, 455.Google Scholar
Winter, L., de Vegt, Chr., Steinbach, M. and Zacharias, N., 1992. ‘Hardware and software aspects of CCD camera-based astrometric plate measurements’, in ‘Digitised Optical Sky Surveys’, eds. MacGillivray, H.T. and Thomson, E.B., Kluwer, Dordrecht, p. 123.CrossRefGoogle Scholar
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