Ultra-weak light standards for assessing the performance of photoelectronic detectors in astronomy.

Astronomy and Astrophysics – Astronomy

Scientific paper

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Detectors:Calibrations

Scientific paper

This paper discusses the general problems of designing and calibrating sources of very weak light of known flux and spectral distribution, at levels necessary for measuring the performance of the various types of detector in current use in astronomy. After a brief introduction to ultra-weak-light photometry, the author describes a laboratory low-level light source built at the RGO for use as a primary standard for calibrating CCD's and PM-tubes etc.

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