Weekly Report 29Oct2010
From RHESSI Wiki
(New page: ===Imaging the Albedo with Pixon and Clean=== Image:Map pixon 301.jpg ===RHESSI Imaging Algorithm Test - Clean and Pixon=== ===RHESSI Website Migration=== =...) |
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| - | ===Imaging the Albedo with Pixon | + | ===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. | ||
| + | [[Image:Map pixon 301.jpg|center|thumb|600px|The background image is the source near disk center. The contours are the original data map.]] | ||
| - | [[Image: | + | 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. |
| + | [[Image:R prof.jpg|center|thumb|600px|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.]] | ||
| - | ===RHESSI Imaging Algorithm Test - Clean | + | 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=== | ||
===RHESSI Website Migration=== | ===RHESSI Website Migration=== | ||
===Goals for next week=== | ===Goals for next week=== | ||
Revision as of 21:25, 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 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 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.
