Lang and Schölkopf blew me away today by suggesting that we combine heterogenous images not by co-adding them but rather by inferring a consistent brightness ranking for the pixels. There are lots of real-world issues (think registration and pixellization and bad data), but there are also lots of reasons that a brightness ranking analysis might be far more robust than a co-adding procedure for finding very faint structure. We set the scope of a fast project to kick this off and Lang started on the dirty work, which involves scraping the web for images (recall our Comet Holmes project?) and running everything through Astrometry.net.
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