Atmospheric Extinction at the Brno and Skalnaté Pleso Observatories. III. Model of extinction derived for Skalnaté Pleso from IHW/IAU medium-band photometrical observation of comets in 1985-90

MIKULÁŠEK, Zdeněk, Ján SVOREŇ and Jozef ŽIŽŇOVSKÝ. Atmospheric Extinction at the Brno and Skalnaté Pleso Observatories. III. Model of extinction derived for Skalnaté Pleso from IHW/IAU medium-band photometrical observation of comets in 1985-90. Contributions of the Astronomical Observatory Skalnaté Pleso. Tatranska Lomnica, Slovak Republic: Astronomický ústav SAV, 2003, vol. 33, No 1, p. 21-28. ISSN 1335-1842.

Basic information

• Original name: Atmospheric Extinction at the Brno and Skalnaté Pleso Observatories. III. Model of extinction derived for Skalnaté Pleso from IHW/IAU medium-band photometrical observation of comets in 1985-90
• Authors: MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor), Ján SVOREŇ (703 Slovakia) and Jozef ŽIŽŇOVSKÝ (703 Slovakia).
• Edition: Contributions of the Astronomical Observatory Skalnaté Pleso, Tatranska Lomnica, Slovak Republic, Astronomický ústav SAV, 2003, 1335-1842.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10308 Astronomy
• Country of publisher: Slovakia
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/03:00007928
• Organization unit: Faculty of Science
• Keywords in English: atmosferic extinction; IHW photometry; comets; dust
• Tags: atmosferic extinction, comets, dust, IHW photometry
• Tags: International impact, Reviewed

Abstract

75 measurements of atmospheric extinction obtained during the observations of bright comets 1P/Halley in 1985/86, 23P/Brorsen-Metcalf in 1989 and C/Austin in 1990 in the IHW/IAU six-colour intermediate band photometric system at the Skalnaté Pleso Observatory have confirmed the 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 spectral parameter a of the dust component of atmospheric extinction: alpha = 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 on the Brno and Skalnaté Pleso Observatories.

Abstract (in Czech)

75 measurements of atmospheric extinction obtained during the observations of bright comets 1P/Halley in 1985/86, 23P/Brorsen-Metcalf in 1989 and C/Austin in 1990 in the IHW/IAU six-colour intermediate band photometric system at the Skalnaté Pleso Observatory have confirmed the 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 spectral parameter a of the dust component of atmospheric extinction: alpha = 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) on the Brno and Skalnaté Pleso Observatories.

Links

• GA205/02/0445, research and development project: Name: Fyzika horkých hvězd a hvězdných systémů s horkými složkami

Investor: Czech Science Foundation, Physics of hot stars and stellar systems with hot components

• ME 131, research and development project: Name: Výzkum kapalných krystalických polymerů