Gamma-ray and optical observations of the 1979 November 8 solar flare
Abstract
The solar flare on 1979 November 8 11h 21m 28s UT was observed by the Tel Aviv telescope of the Big Bear Solar Observatory and the High Resolution Gamma-Ray Spectrometer on the High Energy Astronomy Observatory HEAO 3. Photographs in alpha hydrogen show the development of the flare and a subsequent Moreton wave. Although the flare was not detected with the high spectral resolution germanium detectors, the HEAO C-1 CsI shield detected a statistically significant signal above 80 keV, from 420 to 585 keV, and above 3.8 MeV. The temporal structure of microwave, optical, X-ray, and gamma-ray emission is consistent to within about 1 s with a simultaneous flare response at all energies. There is no evidence for either second-stage acceleration of charged particles (Bai and Ramaty, 1979) or a delay between gamma-ray and X-ray continuum emission due to energy-dependent electron energy loss times (Bai and Ramaty).
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1982
- DOI:
- 10.1086/160176
- Bibcode:
- 1982ApJ...259..392R
- Keywords:
-
- Astronomical Spectroscopy;
- Gamma Ray Astronomy;
- Solar Flares;
- Spaceborne Astronomy;
- Gamma Ray Spectra;
- H Alpha Line;
- Heao 3;
- Sunspots;
- Solar Physics