Weekly Report 29Oct2010
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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 plot below shows the profile of the Pixon Image above, and the background map, as a function of the distance from the brightest pixel. The values of the flux are plotted against the distance, R, from the brightest pixel. The black points are the Pixon reconstruction, the red points are the original background 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
More content was added to the new RHESSI Website. New pages were checked and added to the live site, such as Meetings, Press Stories, Image Gallery, and Photo Gallery. New modules for filelisting were also added. This allows a user to upload documents that can be used on multiple pages. These have to be added for each individual website editor on their local machine. Currently Steven and I are the only ones who have added this capability.
Goals for next week
- Finish adding Pixon profiles and Clean Profiles as a function of the distance from the brightest image pixel to the [Pixon Results Summary] page
- Compile best attempt at the Clean Images for the RHESSI Imaging Algorithm Test. Discuss the results with Brian, and upload to the Genoa site
- Add filelist module to RHESSI Website editors displays. Continue adding new material. We're still aiming for a end of November launch.
- Check into process for migrating files with html markup to typo3.
