Coronal Hard X-ray Sources in Solar Flares: new RHESSI results

S. Krucker

UCB/SSL

The Reuven Ramaty High Energy Imager (RHESSI) provides for the first time high resolution imaging spectroscopy of solar flare in the X-ray and Gamma-ray range. Bremsstrahlung emission from non-thermal flare-accelerated electrons is most prominent from footpoints of flare loops, but is occationally also seen from the corona. This presentation will review recent RHESSI observations of coronal X-ray and Gamma-ray sources including (1) a statistical study of hard X-ray emission in partially occulted flares, (2) Hard X-ray observations from flares occurring 40 degrees behind the solar limb (i.e. observed emission is from 300 arcsec above the flare), (3) Electron bremsstrahlung Gamma-ray emission from coronal flare loops in the October 28, 2003 and January 20, 2005 events.