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The Solid State Area Scanner Photometer

Published online by Cambridge University Press:  12 April 2016

Karl D. Rakos
Karl D. Rakos*
Affiliation:
Institute for Astronomy, University of Vienna, Austria

Extract

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The accuracy of the area scanning technique depends on observing conditions resulting from seeing, tracking irregularities of the telescope, photon and seeing statistics (integration time and the size of the telescope), and the atmospheric spectral dispersion of the stellar image in the spectral region used. In addition, the reduction method as well as the mechanical and optical quality of the telescope and photometer influence the accuracy of the results.

The tracking error of the telescope is usually larger than the observer believes. The amplitude of the periodic error of the worm gear is at best ± 0.5 arc sec with period length between 4 and 10 minutes, depending on the particular telescope. Figure 1 shows the tracking error for the ESO 50 cm and 100 cm telescopes. Other telescopes usually fit in between this two extremes.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 62: Current Techniques in Double and Multiple Star Research , May 1983 , pp. 220 - 223
Copyright
Copyright © Lowell Observatory 1983

References

Rakos, K.D., Albrecht, R., Jenkner, H., Kreidl, T., Michalke, R., Oberlerchner, D., Santos, E., Schermann, A., Schnell, A., Weiss, W., 1981, Astron. & Astrophys. Supp. Series, in print.Google Scholar