Evolution of the X-ray emitting corona preceding and after major solar events
Abstract
Soft X-ray emission from the sun during STIP Interval II, observed with the Lockheed Mapping X-ray Heliometer on the NASA OSO-8 satellite, is presented. In examining the emission versus time for extended intervals around the times of the Class 1B flare on March 28, 1976, and the Class 1B flare on April 30, 1976, we find significantly more low level flare activity prior to the major flares than after. Twelve modest X-ray bursts are investigated and no compelling case of a preflare brightening phase is observed. Preliminary correlations with the time history of emitted solar particles are discussed.
- Publication:
-
COSPAR, 20th Plenary Meeting
- Pub Date:
- June 1977
- Bibcode:
- 1977cosp.meetR....W
- Keywords:
-
- Satellite Observation;
- Solar Corona;
- Solar Flares;
- Solar X-Rays;
- Electron Flux Density;
- Heliometers;
- Light Curve;
- Oso-8;
- Satellite-Borne Instruments;
- Solar Physics