This page (revision-3) was last changed on 07-Dec-2016 14:14 by PeterYoung

This page was created on 17-Mar-2010 21:43 by PeterYoung

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2 17-Mar-2010 21:59 1 KB PeterYoung to previous | to last
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NarrowWorksheet7
NarrowWorksheet7

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[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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Since eis_auto_fit may fit many thousands of spectra for a single raster it is important to be able to quickly assess how accurate the fits were. The widget-based routine 'eis_fit_viewer' takes as inputs the fit structure and the original window data and allows the fits to be compared with the original data.
The results of the fitting process can be checked using the widget-based routine eis_fit_viewer:
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The calling procedure is:
{{{
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}}}
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and a large graphic user interface (GUI) appears containing five graphics windows.
The top 3 graphic windows in the GUI show line intensity, line velocity and line width (FWHM). Note the vertical bands in the velocity window – this is due to the orbital variation of the lines on the detector (see Worksheet 7a).
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The top 3 graphic windows in the GUI show line intensity, line velocity and line width (FWHM). Underneath each window are text boxes that allow the image to be scaled using minimum and maximum values. The 'Auto' button automatically scales the images to preset values.
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The bottom-right window shows a histogram of the selected image pixels for intensity, velocity, line width or chi^2.
Strange line fits will stand out in one or more of the intensity, velocity or line width maps through an anomalously high or low value. By clicking on such pixels one can see the original spectrum with the fit over-plotted. A bad fit may result from missing pixels in the data, line blending or simply be due to interesting physics going on.
The bottom-right window shows a histogram of the selected images pixels for either intensity, velocity or line width.
This page (revision-3) was last changed on 07-Dec-2016 14:14 by PeterYoungTop