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Instantaneous determination of a variable extinction coefficient in photoelectric photometry

  • E. Poretti (a1) and F. Zerbi (a2)

Abstract

Observational evidence was found that even in good photometric sites the extinction coefficient can display large variations during a night. The authors propose a method to determine instantaneous values of the extinction coefficient: it is based on the knowledge of the extra-atmosphere instrumental magnitude m0 for a reference star. An analytical procedure is proposed to determine a reliable value for m0 and results are very satisfactory.

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References

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Vaníček, P., 1971, Astrophys. Space Sci. 12, 10
Poretti, E., Mantegazza, L., 1992, The Messenger 68, 33

Instantaneous determination of a variable extinction coefficient in photoelectric photometry

  • E. Poretti (a1) and F. Zerbi (a2)

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