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Cyclic distribution of energetic X-ray flares

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Abstract

The Blackman-Tukey power spectrum of flare generated X-ray bursts ≥ X1 observed from 1970 to 1982 by satellite instrumentation (SOLRAD/SMS/GOES) shows prominent peaks at 156, 4.8, 2.8, and 1.1 months. According to a statistical test of the significance of the deviation of these peaks from Markov red noise, the peaks at 2.8 and 1.1 months are significant at the 99% confidence level while the peak at 4.8 months reaches the 95% level. A replication by means of the maximum entropy spectral analysis (MEM) yields the same prominent peaks at the same frequencies.

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  1. Schröter Institute for Research in Cycles of Solar Activity, Im Dorfe 14, D-2804, Lilienthal, F.R.G.

    T. Landscheidt

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  1. T. Landscheidt
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Landscheidt, T. Cyclic distribution of energetic X-ray flares. Sol Phys 107, 195–199 (1986). https://doi.org/10.1007/BF00155353

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  • DOI: https://doi.org/10.1007/BF00155353

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