star-galaxy separation

Today Willman, Ross Fadely (Haverford), and I discussed star–galaxy separation. This is usually done morphologically, but at faint levels, there is usually far more information in the spectral energy distribution than in the deviation from pure-psf shape for making this determination. We batted around a few different ways to set up this problem and make a stab at it. Doing this right will be necessary (we think) if LSST is going to do reliable stellar science to its multi-epoch magnitude limit.

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