E-mail: aschwanden@lmsal.com - Markus J.Aschwanden (Lockheed Martin Solar & Astrophysics Lab.)

Image Reconstruction of HESSI Data with Forward-Fitting"
Figures of manuscript version 1 (1999 Dec)
  1. Telescope and grid layout
  2. Telescope cross-section along optical axis
  3. Grid transmission functions
  4. Grid transmission as function of phase angle
  5. Maximum vs minimum transmission
  6. Modulation efficiency versus source size
  7. Examples of modulation profiles for 7 different sources
  8. Examples of modulation profiles of 9 subcollimators for double source
  9. Map parametrization using gaussians, ellipticals, and curved gaussians
  10. Flow chart of forward-fitting algorithm
  11. Modulation and r.m.s. vs. photon count statistics
  12. Decomposition of gaussian positions from back-projection map
  13. Broadening of gaussian profile in back-projection map
  14. Position and width error in forward-fitting vs. photon count rate
  15. Uncertainties of single source parameters in 100 forward-fitting runs
  16. 100 simulations of maps with double sources
  17. Uncertainties of double source parameters in 100 forward-fitting runs
  18. Test simulations of forward-fitting for highest resolution
  19. Chi-square or C-statistic for 200 simulations and forward-fitting solutions
  20. CPU computation time and number of interations in forward-fitting of 200 runs