Quasi-Periodicity of MgXII X-ray Bursts Revealed by CORONAS-F SPIRIT Data for Solar Active Regions

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

A spectral analysis of a series of integrated MgXII 8.42 Å X-ray intensities recorded by the CORONAS-F SPIRIT spectroheliometer is presented. Statistically significant peaks for periods in the intervals 12 30 min and 40 200 min were found in the power spectra. The power spectrum for these periods changed after the emergence of new photospheric magnetic flux in the active region NOAA 9840.

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