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Direct Analysis of Spectra by Image Isocon and Computer

Published online by Cambridge University Press:  12 April 2016

G. A. H. Walker ,
J. R. Auman ,
V. Buchholz ,
B. Goldberg  and
B. Isherwood
G. A. H. Walker
Affiliation:
Institute of Astronomy and Space Science, University of British Columbia, Vancouver
J. R. Auman
Affiliation:
Institute of Astronomy and Space Science, University of British Columbia, Vancouver
V. Buchholz
Affiliation:
Institute of Astronomy and Space Science, University of British Columbia, Vancouver
B. Goldberg
Affiliation:
Institute of Astronomy and Space Science, University of British Columbia, Vancouver
B. Isherwood
Affiliation:
Institute of Astronomy and Space Science, University of British Columbia, Vancouver

Extract

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Astronomical spectra are, with few exceptions, still being recorded on photographic emulsions. These generally have the advantages of better spatial resolution and larger available area than existing photoelectric imaging detectors. On the other hand they do suffer from a small dynamic range (15 or 20: 1), reciprocity failure, and a quantum efficiency of less than 1 per cent. Image intensifiers and image orthocons can be used to improve sensitivity, but where photographs are used for the record the other problems tend to remain. Calibration and extraction of the appropriate astronomical information in digital form involves a considerable amount of time and careful work, as one can appreciate from many of the papers presented at this colloquium.

Type
Part II. Auxiliary Telescope Equipment
Information
International Astronomical Union Colloquium , Volume 11: Automation in Optical Astrophysics , 1971 , pp. 86 - 89
Copyright
Copyright © Royal Observatory 1971

References

Nelson, P. D., 1969. Advances in Electronics and Electron Physics, ed. by McGee, J. D., McMullen, D. and Kahan, E., Vol. 28A, p. 209. London: Academic Press.Google Scholar