Weekly Report 3Sep2010: Difference between revisions
imported>Agopie (New page: ===Visibility Forward Fit - Elliptical Model=== ====Visibility Forward Fit - Elliptical Model(Flux fixed all other parameters free)==== [[Image:Visibility fit.jpg|center|thumb|600p...) |
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===Visibility Forward Fit - Elliptical Model=== | ===Visibility Forward Fit - Elliptical Model=== | ||
For the following tests an eventlist for a simulated point source at disk center was used. The visibility forward fit model used to create the image was an elliptical source. In both cases below the flux was help fixed. In the first case all parameters except for the flux were allowed top vary. In the second case all parameters except for the flux and the eccentricity of the ellipse were allowed to vary. The second case was carried out due to issues with the first case as will be discussed below. | |||
In all cases the measured visibility amplitude is the set shown below. The red curve is the best fit to these visibilities using an elliptical model with all parameters free. In the cases were the flux is fixed the fit to the visibilities is constrained and cannot achieve this optimal fit. | |||
[[Image:Visibility fit.jpg|center|thumb|600px|The visibility amplitudes for each detector along with the best fit letting all parameters vary.]] | |||
====Visibility Forward Fit - Elliptical Model(Flux fixed all other parameters free)==== | ====Visibility Forward Fit - Elliptical Model(Flux fixed all other parameters free)==== | ||
[[Image:Vis flux red chi ell.jpg|center|thumb|600px|]] | [[Image:Vis flux red chi ell.jpg|center|thumb|600px|]] | ||
Revision as of 21:15, 2 September 2010
Visibility Forward Fit - Elliptical Model
For the following tests an eventlist for a simulated point source at disk center was used. The visibility forward fit model used to create the image was an elliptical source. In both cases below the flux was help fixed. In the first case all parameters except for the flux were allowed top vary. In the second case all parameters except for the flux and the eccentricity of the ellipse were allowed to vary. The second case was carried out due to issues with the first case as will be discussed below.
In all cases the measured visibility amplitude is the set shown below. The red curve is the best fit to these visibilities using an elliptical model with all parameters free. In the cases were the flux is fixed the fit to the visibilities is constrained and cannot achieve this optimal fit.
Visibility Forward Fit - Elliptical Model(Flux fixed all other parameters free)
Visibility Forward Fit - Elliptical Model (Flux and Eccentricity fixed all other parameters free)
Difference Plots - Model v. Reconstructed Image
