Instrumental effects on a proposed MG II index of solar activity

Details Instrumental effects on a proposed MG II index of solar activity Instrumental effects on a proposed MG II index of solar activity

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988angeo...6..531h&link_type=abstract

Annales Geophysicae (ISSN 0980-8752), vol. 6, Oct. 1988, p. 531-534.

Astronomy and Astrophysics

Astronomy

14

Magnesium, Resonance Lines, Solar Activity, Solar Instruments, Ultraviolet Astronomy, Balloon-Borne Instruments, Solar Spectra, Spectral Resolution, Wavelengths

Scientific paper

The Mg II resonance lines near 280 nm have been proposed as a monitor for solar activity in the ultraviolet, particularly for the region around 207.5 nm. Balloon measurements in 0.01 nm resolution are used to investigate the dependence of the proposed index on the characteristics of the measuring instrument. It is shown that for measurements using instruments with low spectral resolution, the value of the index is very sensitive to individual instrument characteristics, and that therefore scale standardization is difficult to maintain.

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