Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..769s&link_type=abstract
In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze
Physics
Sun, Flares, Multitemperature Plasma
Scientific paper
The aim of this contribution was to compare the so-called "quasi" differential emission measure distributions (qDEM) with "classical" DEM distributions. The qDEM distributions for the flaring region have been derived from the maps of "isothermal" temperatures and emission measures for the flaring region. The temperature and emission measure maps have been derived based on the deconvolved Yohkoh SXT images. The deconvolution has been performed in order to increase the spatial resolution. Next the images have been overlaid precisely using the position of the occulting solar disc as a reference. The high accuracy of coalignment allowed to derive the temperature maps with spatial resolution down to ~1 arcsec. From the other side the DEM distributions have been determined for a flare as a whole, based on integral flare fluxes measured by SXT and GOES using maximum likelihood iterative algorithm. In principle such a comparison of qDEM and DEM shapes should allow to investigate which part of DEM is related to the bright kernels observed on SXT images.
Sylwester Barbara
Sylwester Janusz
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