Weekly Report 17Sep2010

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Imaging the Albedo with Pixon

The following show Pixon images for simulated data of a circular source with albedo. Each image shows the contours for the Pixon reconstruction overlaid on a map of the original data. Below each image are the profiles for the data and the Pixon fit to the profile, along with the C statistic for each detector. For each image the following parameters were used:

Above each image is the total counts in the final image. Below each image is the source size data as calculated using the 3 sigma source size program written by Rick Pernak.


Reconstructed Pixon Images for a point source with albedo located at heliocentric X = 301 arcsec and Y = 0.0

The total counts in the final image below is: ~10e4 counts

The original data map in green contours with the contours of the Pixon Image overlaid in red for an eventlist with total counts ~10e4

The 3 sigma parameters for the reconstructed image assuming an elliptical source are:

 Source Flux:  32.0174
 Source X:     301.042
 Source Y:     -0.0517814
 Source FWHM:  4.71759
 Eccentricity: 0.253152
 Source Angle: 90.0000 


The following plot shows the profile for each detector compared with the fitted profile along with the C statistic for each detector.

The profile for each detector along with the fitted profile from Pixon. The C statistic for each detector is also shown.


The total counts in the final image below is: ~10e5 counts

The original data map in green contours with the contours of the Pixon Image overlaid in red for an eventlist with total counts ~10e5

The 3 sigma parameters for the reconstructed image assuming an elliptical source are:

 Source Flux:   310.592
 Source X:      301.157
 Source Y:      -0.344853
 Source FWHM:   3.94633
 Eccentricity:  0.0599250
 Source Angle:  107.000


The following plot shows the profile for each detector compared with the fitted profile along with the C statistic for each detector.

The profile for each detector along with the fitted profile from Pixon. The C statistic for each detector is also shown.

The total counts in the final image below is: ~10e6

The original data map in green contours with the contours of the Pixon Image overlaid in red for an eventlist with total counts ~10e6

The 3 sigma parameters for the reconstructed image assuming an elliptical source are:

Source Flux:  1473.15
Source X:     301.232
Source Y:     -0.429101
Source FWHM:  4.42663
Eccentricity: 0.260343
Source Angle: 167.000


The following plot shows the profile for each detector compared with the fitted profile along with the C statistic for each detector.

The profile for each detector along with the fitted profile from Pixon. The C statistic for each detector is also shown.

The plot below shows the flux profile of each image along a line parallel to the Heliocentric X axis. Each solid line shows the profile for an image with different total counts. The dashed line shows the profile of the original data map scaled to match the peak of the trace with the highest flux.

The flux profile along a line parallel to the Heliocentric X axis through the source center for reconstructed Pixon images with different total counts. The dashed line is the profile of the original data map.

Reconstructed Pixon Images for a point source with albedo located at heliocentric X = 929 arcsec and Y = 0.0

The following image shows the original data map with contours for a reconstructed Pixon image with total counts of ~10e4 near the limb.

The original data map in green contours with the contours of the Pixon Image overlaid in red for an eventlist with total counts ~10e4.

The 3 sigma parameters for the reconstructed image assuming an elliptical source are:

Source Flux:  31.2434
Source X:     930.370
Source Y:     -0.653541
Source FWHM:  3.15973
Eccentricity: 0.623439
Source Angle: 197.000


The following plot shows the profile for each detector compared with the fitted profile along with the C statistic for each detector.

The profile for each detector along with the fitted profile from Pixon. The C statistic for each detector is also shown.


The following image shows the original data map with contours for a reconstructed Pixon image with total counts of ~10e5 near the limb.

The original data map in green contours with the contours of the Pixon Image overlaid in red for an eventlist with total counts ~10e5.

The 3 sigma parameters for the reconstructed image assuming an elliptical source are:

Source Flux:  311.739
Source X:     930.703
Source Y:     -0.720957
Source FWHM:  3.15171
Eccentricity: 0.642290
Source Angle: 0.00000


The following plot shows the profile for each detector compared with the fitted profile along with the C statistic for each detector.

The profile for each detector along with the fitted profile from Pixon. The C statistic for each detector is also shown.


The following image shows the original data map with contours for a reconstructed Pixon image with total counts of ~10e6 near the limb.

The original data map in green contours with the contours of the Pixon Image overlaid in red for an eventlist with total counts ~10e6.

The 3 sigma parameters for the reconstructed image assuming an elliptical source are:

Source Flux:  1532.89
Source X:     930.723
Source Y:     -0.440351
Source FWHM:  2.73080
Eccentricity: 0.650604
Source Angle: 183.000


The following plot shows the profile for each detector compared with the fitted profile along with the C statistic for each detector.

The original data map with the contours of the Pixon Image overlaid for an eventlist with total counts ~10e6 near the limb.


The plot below shows the flux profile of each image along a line parallel to the Heliocentric X axis. Each solid line shows the profile for an image with different total counts. The dashed line shows the profile of the original data map scaled to match the peak of the trace with the highest flux.

The flux profile along a line parallel to the Heliocentric X axis through the source center for reconstructed Pixon images with different total counts. The dashed line is the profile of the original data map.

Conclusions


Populating the new RHESSI Website

Continued with populating the new RHESSI Website. Links were added back to documents on the old site. Some of these documents will be left as is, and some will be moved to the new site. The following pages were update:

Finishing RHESSI Inventory

RHESSI inventory was finished. Items which were not on our original property list were accounted for and the inventory list was returned to the 671 administration.

Goals for next week

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