Gamma-ray and optical observations of the 1979 November 8 solar flare

The solar flare on 1979 November 8 11/sup h/21/sup m/28/sup s/ UT was observed by the Tel Aviv telescope of the Big Bear Solar Observatory and the High Resolution Gamma-Ray Spectrometer (designated C-1) on the High Energy Astronomy Observatory HEAO 3. Photographs in Hα 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 approx.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) or a delay between gamma-ray and X-ray continuum emission due to energy-dependent electron energy loss times (Bai and Ramaty). Subject headings: gamma rays: general: Sun: flares