Solar Flares in the Extreme Ultraviolet. I. The Observations
Abstract
Solar-flare observations in the extreme ultraviolet (300-1350 Å) are reported. Some 269 flares observed by the Harvard College Observatory (HCO) experiment on OSO 4 and 211 flares observed by the HCO experiment on OSO 6 have been analyzed. The flares were observed in spectral lines and continua emitted by many ionic species over a temperature range from 104 to 3.5 × 106 K. The EUV data have been correlated with X-ray, Hα, and radio observations, and a significant number of EUV bursts not associated with reported Hα, X-ray, or radio bursts have been iden tified and investigated. The results indicate that these latter EUV events are less energetic by about a factor of 2 than EUV bursts associated with — F subflares.
- Publication:
-
Solar Physics
- Pub Date:
- May 1972
- DOI:
- 10.1007/BF00231094
- Bibcode:
- 1972SoPh...24..169W
- Keywords:
-
- Flare;
- Spectral Line;
- Harvard College;
- Ionic Species;
- Solar Flare