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New Data type: Supernova Ia with covariance

Item posted by Sandro Dias Pinto Vitenti <vitenti> on Tue Dec 11 19:10:12 2012.

Added support to Supernova Ia with non diagonal covariance matrices to the library. In this new model the phenomenological parameters alpha, beta, sigma_int, etc can be analyzed together with the cosmological parameters. This allows analysis similar to what is done, for example, in Conley 2011 ( ).

Added a simple example of model fitting using SN Ia data: ( ).

Several other improvements:
- Serialization.
- the darkenergy fitter.
- Documentation.
- Bug fixes.


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