Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1201a&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Nov. 1986, p. 1201-1207.
Astronomy and Astrophysics
Astronomy
11
Astronomical Observatories, Astronomical Photometry, Atmospheric Attenuation, Extinction, Annual Variations, Power Spectra, Spectrum Analysis, Ubv Spectra
Scientific paper
Atmospheric extinction coefficients in the U, B, V bands have been measured at McDonald Observatory on 382 nights covering the 20-year period December 1960 to December 1980. Analyses of these data characterize the natural levels and variations in atmospheric extinction during both perturbed (Mount Agung eruption) and unperturbed times. The need for nightly extinction measurements is clearly shown. No significant long-term trends were found. Power spectrum analysis shows only the sinusoidal seasonal variation with minimum extinction in January.
Angione Ronald J.
de Vaucouleurs Gerard
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