List of Figures

1. stack_analyze main screen
2. The File drop-down menu
3. Removing a bad file from the stack
4. $I_{0}$ from histogram
5. Region of interest widget.
6. Spectral regions
7. Optical density map from spectral regions
8. Reading a stack list file
9. Clipping to the $I$ region
10. Building stack file lists
11. Automatic alignment screen
12. Manual alignment screen
13. Noise filter widget
14. pca_gui main menu
15. Preprocess menu
16. Limiting the energy range
17. Component menu
18. Spatial power spectra of component images
19. Cluster widget
20. Setting the radial cutoff for angle distance measure
21. Illustration of angle distance measure
22. Scatterplot menu
23. Scatterplot menu: spherical projection
24. Dendrogram widget
25. Target widget