Abstract: |
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Sequences of RESIK high-resolution X-ray spectra observed for
selected, moderate importance flares have been used to determine
time variations of absolute fluxes in a number (~ 20) of lines formed in the temperature range from 3 MK to 50 MK. Based on
measured line fluxes, corresponding differential emission measure
(DEM) distributions have been calculated at various times throughout
the flare, showing up two distinctive plasma components with a lower
(3 MK < T < 12 MK) and higher (T > 12 MK) temperatures. Images of
flares obtained from SOHO-EIT and/or TRACE have
been used to unveil the flare geometry. GOES soft X-ray
data have been used to study overall flare energy balance. We have
constructed so-called diagnostic diagrams (
Temperature-Emission Measure) from GOES data and
for the comparison for each temperature component from RESIK DEM
inversion. The results obtained show-up that a straightforward
interpretation of evolutionary tracks obtained from GOES
may not be directly possible. |