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J.T. Scott, J.W. Cirtain, P.C.H. Martens, H.D. Winter (Montana State University)
Data collected by the Transition Region and Coronal Explorer (TRACE) and the Coronal Diagnostic Spectrometer (CDS) of an Active Region above the limb is examined. We have developed a co-alignment routine which finds the limb in each image and uses a cross correlation feature tracking algorithm to produce co-spatial images that are accurate to within 4\arcsec. TRACE generated an image for every CDS exposure. We have taken these images and selected only the portion of the TRACE field of view which was co-temporal with each CDS exposure, in essence generating a high resolution TRACE snapshot for each of the CDS exposures. We compare this image to the CDS raster, a composite of all 40 exposures taken during the study. We were able to determine the number of TRACE resolved features within each CDS pixel in an effort to provide an accurate lower bound estimate for the CDS filling factor. We were also able to show that structures with the same apparent brightness in the TRACE images are not necessarily at the same temperature and density.
This research is supported by NASA TRACE grant 426960, NASA GSRP fellowship 425175, and NASA grant NAG5-12820
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Bulletin of the American Astronomical Society, 36 #2
© YEAR. The American Astronomical Soceity.