You can use Sherpa to model your image data with the PSF. The Sherpa will give
you normalization as well as the residuals map. I'm working on the thread which
should be on the Web somtime this week.
In meantime you can try Sherpa:
---------
read data:
data myimage.fits
read psf file:
psffromfile[psf0]
psf0.file = mypsf.fits
Now you can use psf0 as model to get the normalization and the centroid location, or you can use it as a convolution kernel in fitting your surface brightness model.
use as a model:
source 1 = psf0
or
use as a convolution kernel:
source 1 = <some model for the surface brightness >
instrument 1 = psf0
You can get more help on the PSF in online Sherpa help:
"ahelp psffromfile" and in the Model section of the manual.
-Aneta Siemiginowska
__________________________________________________________________________
Aneta Siemiginowska Chandra X-Ray Center (CXC)
asiemiginowska@cfa.harvard.edu Harvard-Smithsonian
Center for Astrophysics
Phone:(617)-495-7243 60 Garden St. MS-4
FAX: (617)-495-7356 Cambridge, MA 02138
__________________________________________________________________________
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