I worked out a graphical model for the GALEX photon project, and it reminded me that in order to operate on the photons, we need a spacecraft attitude model, a focal-plane mapping model (WCS), a point-spread function model, a model of the focal-plane sensitivity map, and a background photon rate model. With all these in place we can do any time-domain projects. I also thought a tiny bit about how we might release these functions to the public when we release the data. In the meantime, Greenberg and Gertler are working on approximations, and re-discovering our transiting sources (which we still have to write up, Schiminovich!). In other news, David Mykytyn arrived in Heidelberg today for a week-long sprint on the Atlas.
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