Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...136..299s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 136, no. 2, July 1984, p. 299-305.
Astronomy and Astrophysics
Astrophysics
4
Astronomical Photometry, Solar Oscillations, Space Observations (From Earth), Data Reduction, Power Spectra, Spectroscopic Telescopes
Scientific paper
Using a diffraction telescope at ESO-La Silla, photometric measurements of the full disk solar light were obtained in the H-beta, B, and V spectral domains in December 1981, and December 1982/January 1983. The photometric device random error was reduced to 0.00008 for one minute averages, and systematic errors over periods of 20 minutes were not detected. Power spectra obtained in 1981 show significant peaks at 3.200 and 3.334 mHz. The data of 1983 show peaks at 3.333 mHz without any associated peak in the air pressure analysis. It is suggested that the experimental set-up can be improved through simultaneous monitoring of the sunlight and its variation; reconstruction of the diffraction telescope and microbarograph for provision of a continuous data strip; insertion of suitable diaphragms in front of the solar telescope achromat for the study of separate parts of the solar surface; and improved simultaneous measurements in several channels at different wavelengths, and in intensity/spectroscopic observations.
Schmidt-Kaler Theodor
Winkler Ch.
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