Douglas Brenner (AMNH) dropped by for a discussion of spectrum extraction, related to the coronography stuff we have been working on. I pointed him to this instant classic, a paper much discussed a few years ago in this forum (for example here). At lunch, Muna talked about software development for stellar population synthesis, which could have a big impact in the large-spectroscopic-survey world we are currently in. In the afternoon, Foreman-Mackey produced color-color plots for stars in his re-calibration (self-calibration) of SDSS Stripe 82 imaging. They are looking very good.
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