Reuven Ramaty High Energy Solar Spectroscopic Imager

RHESSI Source Profiles

Are the spatial profiles of HXR sources really Gaussian?
http://www.lmsal.com/~aschwand/hessi_imaging/hessi_fwd_talk.html)
Is there any reason why they should be?
What can RHESSI tell us about spatial profiles?
1. Pixelized maps? (Many built-in assumptions)
2. Pixelized Forward Fitting? (Assumes a shape we are looking for.)
3. Fourier Transforms? (Matches the hardware.)
Simplifying assumptions:
- Single-component (no beating in profile)
- Steady (flux variability is small)
- Strong (good S/N)
- Round (nearly constant amplitude)
Relative Amplitudes
Predicted Relative Amplitudes for model sources

Last modified: Mon May 20 14:41:58 EDT 2002