Weekly Report 29Oct2010

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===RHESSI Imaging Algorithm Test - Clean===
===RHESSI Imaging Algorithm Test - Clean===
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Testing of the Clean Image Algorithm for the RHESSI Imaging test continued. The images for all 'default' Clean images as agreed upon in Annapolis are present in the  [http://hesperia.gsfc.nasa.gov/~agopie/clean_sim_maps__01.sav following sav file]. Currently I'm working on creating the sav files for the best possible Clean images. Since they all have different parameters I'm currently saving the files separately, but need to put them all together before uploading them to the Algorithm Test website.
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===RHESSI Website Migration===
===RHESSI Website Migration===
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===Goals for next week===
===Goals for next week===

Revision as of 21:31, 2 November 2010

Contents

Imaging the Albedo with Pixon

Reconstructed Pixon Images were created using detectors 1 thru 4. The detectors with finer grids were used because the original source has a known width of 5 arcsec. The energy band used was 24-51 keV. As an example of the images created the Pixon Image for the source near disk center is below.

The background image is the source near disk center. The contours are the original background image.

The background image is the source near disk center. The contours are the original data map.

The plot below shows shows the profile of the Pixon Image above and the background map as a function of the distance from the brightest pixel. Each point, r, values of flux at that distance. The black points are the Pixon reconstruction, the red points are the original background map.

The plot shows the flux as a function of distance away from the brightest pixel in the image for the Pixon Reconstruction and original data map. The black points are the pixon reconstruction, the red points are the original data map.

The background image varies smoothly from the center and falls to zero. The Pixon Reconstruction shows artifacts that are not present in the original. There is a larger area of flux toward the limb that is not present in the original map. Using the profile as a function of distance from the brightest pixel in the map allows more of the structure to be seen than looking at flux along a line through the image.

The results for all images will be put on the Pixon Results Summary page.

RHESSI Imaging Algorithm Test - Clean

Testing of the Clean Image Algorithm for the RHESSI Imaging test continued. The images for all 'default' Clean images as agreed upon in Annapolis are present in the following sav file. Currently I'm working on creating the sav files for the best possible Clean images. Since they all have different parameters I'm currently saving the files separately, but need to put them all together before uploading them to the Algorithm Test website.


RHESSI Website Migration

Goals for next week

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