Possible variations in atmospheric extinction

Astronomy and Astrophysics – Astronomy

Scientific paper

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Earth Atmosphere, Extinction, Stellar Spectrophotometry, Electrophotometry, Nocturnal Variations, Stellar Luminosity

Scientific paper

Results are reported for a study of atmospheric extinction based on photoelectric scanner observations of several standard stars at wavelengths of 3569, 4176, 4796, 5556, 6015, 6747, and 7500 A. It is found that even on the best photometric nights atmospheric extinction may vary by several hundredths to one-tenth of a magnitude with characteristic periods of several minutes to 1.5 hours. The results show that such extinction variations significantly degrade the realizable accuracy of photoelectric photometric observations.

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