AAS 200th meeting, Albuquerque, NM, June 2002
Session 76. First Results from RHESSI
SPD Oral, Thursday, June 6, 2002, 10:00-11:30am, Ballroom C

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[76.05] The Return of High Resolution Hard X-ray Flare Spectroscopy

R. A. Schwartz (LASP/GSFC & SSAI), RHESSI Team

After a twenty-two year hiatus, we again have the ability to view the solar flare hard X-ray spectrum with the full capability needed to resolve its features. HESSI became operational on 12 February with an energy resolution of 1 keV FWHM below 100 keV. With a threshold of about 4 keV, and a dynamic range expanded by a system of movable x-ray translucent shutters, we have seen a full spectrum of hard X-ray flares. We will show this full range of spectra, with thermal and non-thermal fits as the data suggests, for a wide class of events. We will particularly concentrate on the shape of the spectrum at the peak and close to the peak of the high energy burst during the event.

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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.