Introduction into Forward-Fitting of HESSI Images

HESSI Data Analysis Meeting / 1999 Oct 22, NASA/GSFC, Greenbelt/MD

1. Forward Fitting: Philosophy and Concept
2. How suitable is Forward Fitting for solar HXR images ?
3. HXT images of 54 solar flares (Aschwanden et al. 1999, ApJ 517, 977; Fig.1)
4. 2-D Gaussian Decomposition of 54 solar flares (Aschwanden et al. 1999, ApJ 517, 977; Fig.2)
5. 1-D Gaussian Fit of 54 solar flares (Aschwanden et al. 1999, ApJ 517, 977; Fig.3)
6. Numerical steps of Forward-Fitting Algorithm
7. Flow-chart of Forward-Fitting Algorithm
8. Back-Projection of a single Gaussian source with 3 iterative decompositions
9. Modulation Pattern Profiles (in 9 Collimators) of Backprojection and Model
10. Applications of Forward-Fitting: Footpoint motion d(t) and spectral location d(E)