SOLAR FLARE X-RAY BURST ON 28 SEPTEMBER 1961
Abstract
The importance three flare of 28 September 1961 was exceptionally intense in its production of H alpha light. It also emitted a burst of X-rays observed by high-altitude, balloon-borne detectors. The burst had a small precursor, a very rapid ris , and a three component d cay. The main part of the burst is interpre ed as being made up of three separate pulses. The X-ray burst shows two remarkable assocations with the flare's radio noise emission: (1) Microwave bursts at the highest radio frequencies coincide precisely in time with precursor and the main peak. (2) Groups of type III bursts occur at or near the time of discontinuities in the decay of the X-ray burst and thus are associated with the leading edges of the three energetic electron pulses whose bremsstrahlung constitutes the observed X-ray flux. The appearance of both type III radiation originating in the corona at about 100,000 Km and bremsstrahlung X-rays which c nnot reasonably b produced above roughly 5000-Km height in the chromosphere gives strong evidence that energetic electrons undergo large scale otions in the solar atmosphere during chromospheric flares. A detailed analysis of the spectral time variation shows that the sol r electrons ust spend most of t eir time above the 10,000-Km level. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1962
- Accession Number
- AD0275429
Entities
People
- J.r. Winckler
- K.a. Anderson
Organizations
- University of California, Berkeley