Weekly Report 13Aug2010
From RHESSI Wiki
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[[Image:Uvsmooth d1 d9 limb center profile.jpg|center|thumb|600px|]] | [[Image:Uvsmooth d1 d9 limb center profile.jpg|center|thumb|600px|]] | ||
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+ | ====VIS Forward Fit==== | ||
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+ | ====Forward Fit==== | ||
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+ | ===Reconstructing Images for Simulated Sources=== | ||
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+ | I've started writing an IDL program to reconstruct an image using a user chosen algorithm and calculate the difference between the reconstructed image and the original data map by doing a pixel by pixel comparison. Right now I'm trying to do this using Eduard Kontar's simulated data because it is the only set for which I have the original data maps. I'll put my preliminary version on the Wiki on Monday when I get back to town. | ||
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+ | ===Using CASA Algorithms to create Images with RHESSI Data=== | ||
+ | Brian has decided that this may be a larger and more complicated project than can feasibly be done at present time. I have sent an email to the CASA software group to check on the form our data would need to be in to use their imaging software. I'm waiting for a response. | ||
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+ | ===Assisted visiting student Weishun Liu=== | ||
+ | I assisted a visiting graduate student from Montana State University with using the OSPEX software to fit RHESSI spectra. I also tried to help her with problems relating to her SSW Installation and upgrade. Those problems were solved with the help of Kim Tolbert and Laszlo Etesi. |
Revision as of 21:03, 13 August 2010
Contents |
Weekly Report 13Aug2010
Comparison of a point source with albedo at disk center and a point source with albedo near the limb
The following is a comparison of a simulated point source with albedo at disk center and a simulated point source with albedo near the limb of the sun. In each case the same imaging technique was used to image the source at disk center and on the limb with identical starting parameters. The differences were the eventlist file used in each case, as one had been separately created for each case, and changing the image center so the field of view would include the source.
Clean
The image below shows the contours for two clean images. The blue contours are for the point source with albedo at disk center. The white contours are the point source with albedo near the limb. This image has been translated so that the 90% contour matches the 90% contour at disk center. Both images were made using detectors 1 - 4.
Pixon
UV Smooth
VIS Forward Fit
Forward Fit
Reconstructing Images for Simulated Sources
I've started writing an IDL program to reconstruct an image using a user chosen algorithm and calculate the difference between the reconstructed image and the original data map by doing a pixel by pixel comparison. Right now I'm trying to do this using Eduard Kontar's simulated data because it is the only set for which I have the original data maps. I'll put my preliminary version on the Wiki on Monday when I get back to town.
Using CASA Algorithms to create Images with RHESSI Data
Brian has decided that this may be a larger and more complicated project than can feasibly be done at present time. I have sent an email to the CASA software group to check on the form our data would need to be in to use their imaging software. I'm waiting for a response.
Assisted visiting student Weishun Liu
I assisted a visiting graduate student from Montana State University with using the OSPEX software to fit RHESSI spectra. I also tried to help her with problems relating to her SSW Installation and upgrade. Those problems were solved with the help of Kim Tolbert and Laszlo Etesi.