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On the Measurement of Atmospheric Extinction by Rufener’s Method

Published online by Cambridge University Press:  25 April 2016

Z. KviZ
Z. KviZ*
Affiliation:
University of New South Wales, Broken Hill Division
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Extract

The coefficient of atmospheric extinction may change during the night and in fact it often does. This has an adverse effect on the determination of atmospheric extinction by simple Bouguer plot of magnitude against air mass. This effect was studied by Rufener (1964), who introduced for the purpose of accurate photoelectric photometry in the Geneva photometric system the method of two ‘extinction stars’. His method consists of the measurement of two stars of the same colour — one starting at high air mass 2 - 3, the M-star (for French montante = rising) and the second starting simultaneously in the meridian at low air mass, the D—star (for descending).

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 3 , Issue 5 , 1979 , pp. 326 - 327
Copyright
Copyright © Astronomical Society of Australia 1979

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References

Rufener, F., Pubi. Obs. Geneve, 66, (1964).Google Scholar
Kviz, Z., Proc. Aslron. Soc. Ausi. 3, 275 (1978).Google Scholar
Kviz, Z., IAU Colloq. No. 46, Hamilton, N.Z., ‘Changing trends in Variable Star research’ (in press 1979).CrossRefGoogle Scholar