Roweis and I started working on the problem of finding N galaxy spectra that cover
all SDSS galaxy spectra. We have to find all of the pairs ij where the spectrum of galaxy i is a good model for the spectrum of galaxy j and then Roweis has an algorithm that finds the smallest subset of the covering spectra i such that every spectrum j in the sample is covered. This subset is a discrete sampling of the entire space of galaxy spectra, or you can think of it as a non-parametric description of that space; we will also identify outliers.
2008-03-19
archetypes
Labels:
sdss,
spectroscopy,
statistics
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