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Observation of global 160-min infrared (differential) intensity variation of the Sun (1983)

Kotov, V. A. ; Koutchmy, S. ; Koutchmy, O.

Springer

Solar physics 82 (1983), S. 21-35

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ISSN: 1573-093X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The method developed and the instrument designed for detecting variations of the solar limb darkening at the atmospheric transparency window of the solar opacity minimum region of λ 1.65 μ are described. This differential technique proved to be successful in rejecting undesirable low frequency noises due to the atmosphere and to the instrument. Analysis of observations made in 1977, 1978, and 1981 indicates the persistance of global fluctuations of the IR differential, center-to-limb intensity at the wellknown 160 min period with an average amplitude of about ± 2 × 10-4 in units of the ‘average Sun’ intensity near 1.65 μm.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00145542

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