Atmospheric Extinction Derived from Cometary Observations

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Authors

SVOREŇ Ján ŽIŽŇOVSKÝ Jozef MIKULÁŠEK Zdeněk TREMKO Jozef

Year of publication 2002
Type Article in Proceedings
Conference Optics of Cosmic Dust, proceedings of a NATO Adv. Research Workshop Slovak Republic.
MU Faculty or unit

Faculty of Science

Citation
Field Astronomy and astrophysics
Keywords atmospheric extinction; IHW photometric system; dust; comets
Description Extinction measurements in the intermediate band IHW/IAU system obtained during the observations of bright comets 1P/Halley in 1985/86, 23P/Brorsen-Metcalf in 1989 and C/Austin in 1990 are used in this study. 78 measurements in 21 observational nights cover all the parts of year with the exception of spring with cloudy weather in our mountain site and June with the shortest observational nights. Average extinction coefficients are derived in the paper and some conclusions of common validity (in central European conditions) are formulated. The results of IHW/IAU extinction study have been compared with the results of UBV extinction coefficients gained mostly as a by-product of the photoelectric photometry of variable stars (407 nights in the period from 1962 to 1995). Seasonal variations of atmospheric extinction are discussed.
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