MULTIPLE WAVELENGTH OBSERVATIONS OF AN OFF-LIMB ERUPTIVE SOLAR-FLARE

The eruptive prominence and limb flare which occurred at 1454 UT on 19 89 June 20 is described and analyzed. This event was observed by many different instruments providing an unusual amount and variety of data: images at 1.4 GHz, 37 GHz, and Halpha, and spectra in hard X-ray, sof t X-ray, and radio frequencies. This array of data allows us to explor e the relationships between flare and eruptive prominence emissions at different wavelengths. VLA images at 1.4 GHz show changing sources in a set of high (approximately 10(10) cm) coronal loops associated with the erupting prominence. We use a full gyrosynchrotron code to model a 1.4 GHz source early in the flare as a large coronal loop. The model results lead us to conclude that the initial acceleration occurs in s maller, denser loops which also produce the flare's hard X-ray emissio n. We also present evidence that a source at 1.4 GHz later in the even t is due to second-harmonic plasma emission. This source is adjacent t o a leg of the prominence and comes from a dense column of material in the magnetic structure supporting the prominence. Finally, we investi gate a source of microwaves and soft X-rays, occurring almost-equal-to 10 minutes after the hard X-ray peak, and calculate a lower limit for the density of the source.