[AstroPy] Python spectral fitting package - ala Sherpa
Paul Barrett
barrett at comet.stsci.edu
Fri Apr 25 08:57:43 EDT 2003
<x-flowed>Has anyone on this list used the spectral fitting application, Sherpa,
that is part of Chandra's CIAO data analysis package?
I've been using it to analyze/fit FUSE spectra. I like the design of
this application, because it separates the minimization algorithm from
the statistical fit. I routinely use the Bayesian statistic instead of
the chi-square, since it produces faster and better fits to my spectra.
On the negative side, Sherpa uses the S-language which is smaller that
Python and Numeric, but is also less advanced. The user can also add his
own models to Sherpa, but is limited to only one model written in C. All
others must be written in S-lang which I find cumbersome for complicated
models.
The purpose of this message is to see if anyone is interested in
developing a Python spectral fitting module based on Sherpa's design of
separating the minimization and statistical algorithms. The use of
Python classes would make for a simple, yet robust spectral fitting module.
Any intereste out there?
-- Paul
-------------------------------------------------------------------------
Paul Barrett, PhD Space Telescope Science Institute
Phone: 410-338-4475 ESS/Science Software Group
FAX: 410-338-4767 Baltimore, MD 21218
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