Weekly Report 25Mar2011: Difference between revisions

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The RHESSI Albedo Imaging test continued.
The RHESSI Albedo Imaging test continued.


The following steps were attempted with Clean:
The following steps were attempted with Pixon:


*Clean images were made from maps that contained two circular Gaussian sources.
*Pixon images were made from maps that contained two circular Gaussian sources.
*The sources were centered at the same location in the original map.
*The sources were centered at locations 4 arcsecs apart.
*One source was compact (standard deviation of 2 arcsecs) while the other was extended
*One source was compact (standard deviation of 2 arcsecs) while the other was extended.
*
*Pixon images were made with three detector combinations 1-9, 1-4, and 4-9.


The table below shows the detector combinations


[[File:Orig map two sources.jpg |center|thumb|500px|]]
[[File:Orig map two sources.jpg |center|thumb|500px|]]
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{| class="wikitable"  
{| class="wikitable"  
|-  
|-  
|'''Original Map Configuration'''||'''Imaging Algorithm'''||'''Detectors Used'''||'''Image Centroid X'''||'''Image Centroid Y'''||'''Standard Deviation X'''||'''Standard Deviation Y'''|
|'''Original Map Configuration'''||'''Imaging Algorithm'''||'''Detectors Used'''||'''Image Centroid X'''||'''Image Centroid Y'''||'''ST DEV X'''||'''ST DEV Y'''||
|-
|-
|Two Circular Gaussian Sources (offset by 4 arcsec)||Pixon||1 to 9||907.47||256.34||9.64||9.64|
|Two Circular Gaussian Sources (offset by 4 arcsec)||Pixon||1 to 9||907.47||256.34||9.64||9.64||
|-
|-
|Two Circular Gaussian Sources (offset by 4 arcsec)||Pixon||4 to 9||907.21||256.18||9.38||9.56|
|Two Circular Gaussian Sources (offset by 4 arcsec)||Pixon||4 to 9||907.21||256.18||9.38||9.56||
|-
|-
|Two Circular Gaussian Sources (offset by 4 arcsec)||Pixon||1 to 4||910.37||255.26||2.27||2.12|
|Two Circular Gaussian Sources (offset by 4 arcsec)||Pixon||1 to 4||910.37||255.26||2.27||2.12||
|-
|-
|Two Circular Gaussian Sources (offset by 2 arcsec)||Pixon||1 to 4||910.79||255.26||2.46||2.28|
|Two Circular Gaussian Sources (offset by 4 arcsec)||Clean||1 to 9||907.59||256.18||8.98||9.02||
|-
|-
|Two Circular Gaussian Sources (offset by 2 arcsec)||Pixon||4 to 9||910.59||255.85||4.05||4.13|
|Two Circular Gaussian Sources (offset by 4 arcsec)||Clean||1 to 4||910.87||255.92||5.97||5.82||
|-
|-
|Two Circular Gaussian Sources (offset by 2 arcsec)||Pixon||1 to 9||910.37||255.26||3.59||3.46|
|Two Circular Gaussian Sources (offset by 4 arcsec)||Clean||4 to 9||907.83||256.21||9.75||9.83||
|-
 
|}
|}




[[File:Pixon profiles two sources.jpg|center|thumb|700px|The plot shows the flux profiles of images made with Pixon from a map with two offset Gaussian sources, one with a standard deviation of two arcsecs and one with a standard deviation of 10 arcsec. The seperation of the two sources is 4 arcsecs. The plots were made from images using detectors 1 to 9, detectors 1 to 4, and detectors 4 to 9. ]]
[[File:Pixon profiles two sources.jpg|center|thumb|700px|The plot shows the flux profiles of images made with Pixon from a map with two offset Gaussian sources, one with a standard deviation of two arcsecs and one with a standard deviation of 10 arcsec. The seperation of the two sources is 4 arcsecs. The plots were made from images using detectors 1 to 9, detectors 1 to 4, and detectors 4 to 9.]]

Revision as of 20:20, 30 March 2011

RHESSI Albedo Imaging Test

The RHESSI Albedo Imaging test continued.

The following steps were attempted with Pixon:

  • Pixon images were made from maps that contained two circular Gaussian sources.
  • The sources were centered at locations 4 arcsecs apart.
  • One source was compact (standard deviation of 2 arcsecs) while the other was extended.
  • Pixon images were made with three detector combinations 1-9, 1-4, and 4-9.

The table below shows the detector combinations

Orig map two sources.jpg
Original Map Configuration Imaging Algorithm Detectors Used Image Centroid X Image Centroid Y ST DEV X ST DEV Y
Two Circular Gaussian Sources (offset by 4 arcsec) Pixon 1 to 9 907.47 256.34 9.64 9.64
Two Circular Gaussian Sources (offset by 4 arcsec) Pixon 4 to 9 907.21 256.18 9.38 9.56
Two Circular Gaussian Sources (offset by 4 arcsec) Pixon 1 to 4 910.37 255.26 2.27 2.12
Two Circular Gaussian Sources (offset by 4 arcsec) Clean 1 to 9 907.59 256.18 8.98 9.02
Two Circular Gaussian Sources (offset by 4 arcsec) Clean 1 to 4 910.87 255.92 5.97 5.82
Two Circular Gaussian Sources (offset by 4 arcsec) Clean 4 to 9 907.83 256.21 9.75 9.83


The plot shows the flux profiles of images made with Pixon from a map with two offset Gaussian sources, one with a standard deviation of two arcsecs and one with a standard deviation of 10 arcsec. The seperation of the two sources is 4 arcsecs. The plots were made from images using detectors 1 to 9, detectors 1 to 4, and detectors 4 to 9.
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