On the instrumental and atmospheric stray-light for solar observations

Details On the instrumental and atmospheric stray-light for solar observations On the instrumental and atmospheric stray-light for solar observations

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...87..187m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 87, Aug. 1983, p. 187-193.

Physics

14

Astronomical Photometry, Atmospheric Correction, Instrument Compensation, Solar Instruments, Coronagraphs, Electrophotometers

Scientific paper

From aureole measurements made with a 40 cm-Vacuum-Telescope at Izaña (Tenerife) in the wavelength region 417 nm < λ < 785 nm and from a comparison with other aureole measurements the author concludes: (1) Within one solar radius from the limb, the aureole is mostly of instrumental origin. (2) Beyond that distance, the contribution of atmospheric stray-light becomes noticeable. (3) The atmospheric contribution to the aureole intensity is, under good conditions at mountain stations, a very slowly decreasing function, and amounts to some 10-5 of the solar disk intensity. A procedure is given to separate the variable atmospheric component of the stray-light from the constant instrumental one.

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