Atmospheric extinction at the Brno and Skalnaté Pleso observatories. III. A model of Skalnaté Pleso extinction derived from IHW/IAU medium-band photometrical observations of comets in 1985-90

Details Atmospheric extinction at the Brno and Skalnaté Pleso observatories. III. A model of Skalnaté Pleso extinction derived from IHW/IAU medium-band photometrical observations of comets in 1985-90 Atmospheric extinction at the Brno and Skalnaté Pleso observatories. III. A model of Skalnaté Pleso extinction derived from IHW/IAU medium-band photometrical observations of comets in 1985-90

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003coska..33...21m&link_type=abstract

Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 33, no. 1, p. 21-28.

Astronomy and Astrophysics

Astronomy

Atmospheric Extinction, Skalnaté Pleso Observatory, Ihw/Iau Photometric System

Scientific paper

75 measurements of atmospheric extinction obtained during observations of bright comets 1P/Halley in 1985/1986, 23P/Brorsen-Metcalf in 1989 and C/1989 X1 (Austin) in 1990 in the IHW/IAU six-colour intermediate band photometric system at the Skalnaté Pleso Observatory confirmed validity of the two-component model of atmospheric extinction published in Paper II. That is a superposition of a more or less constant component of Rayleigh scattering on temporary clumps of molecules of air and a heavily variable component of scattering on dust particles (aerosols). The found value of a spectral parameter α of the dust component of atmospheric extinction, α=1.01±0.28, suggests that the scattering centres are tiny dielectric dust particles. 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).

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