RHESSI soft X-ray imaging spectroscopy of a flare

Details RHESSI soft X-ray imaging spectroscopy of a flare RHESSI soft X-ray imaging spectroscopy of a flare

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh31a..03h&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SH31A-03

Other

7519 Flares, 7554 X Rays, Gamma Rays, And Neutrinos, 7594 Instruments And Techniques

Scientific paper

We apply RHESSI imaging spectroscopy to a well-observed solar flare on 26~April~2003. This GOES M2-class flare (N20W69) exercised all three of the RHESSI shutter states, and was simultaneously observed by the RESIK high-resolution X-ray spectrometer on board the CORONAS-F spacecraft (Dennis et al., 2005). It thus provides an excellent opportunity to study the behavior of the high-throughput RHESSI observations of the Fe~emission-line complex at ~6.7~keV. The equivalent width of this feature has a unique dependence on the assumed isothermal temperature of the source (Phillips, 2004). Comparing this feature-derived temperature between the onset and decay phases of the event, we note a discrepancy between it and the temperature derived directly from the continuum. We analyze the causes of this discrepancy in terms of image morphology, non-isothermality, non-equilibrium excitation, and instrument properties.

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