Weekly Report 25Mar2011

RHESSI Albedo Imaging Test

The RHESSI Albedo Imaging test continued.

The following steps were attempted with Clean:

• Clean images were made from maps that contained two circular Gaussian sources.
• The sources were centered at the same location in the original map.
• One source was compact (standard deviation of 2 arcsecs) while the other was extended

Original Map Configuration	Imaging Algorithm	Detectors Used	Image Centroid X	Image Centroid Y	Standard Deviation X
Two Circular Gaussian Sources (offset by 4 arcsec)	Pixon	1 to 9	907.47	256.34	9.64
Two Circular Gaussian Sources (offset by 4 arcsec)	Pixon	4 to 9	907.21	256.18	9.38
Two Circular Gaussian Sources (offset by 4 arcsec)	Pixon	1 to 4	910.37	255.26	2.27
Two Circular Gaussian Sources (offset by 2 arcsec)	Pixon	1 to 4	910.79	255.26	2.46
Two Circular Gaussian Sources (offset by 2 arcsec)	Pixon	4 to 9	910.59	255.85	4.05
Two Circular Gaussian Sources (offset by 2 arcsec)	Pixon	1 to 9	910.37	255.26	3.59

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.