At group meeting, Dun Wang showed his first results from his work on the GALEX photons. He showed some example data from a scan across the Galactic plane and back, performed by Schiminovich in the spacecraft's last days. The naively built image has a double point-spread function, because the satellite attitude file is not quite right. Wang then showed that on second (or even half-second) time scales, he can infer the pointing, either by cross-correlating images, or else correlating with known stars. So the satellite pointing could be very well calibrated with a data-driven model. That's awesome!
Also at group meeting, Vakili discussed taking his model of the point-spread function up to super-resolution (that is, modeling the PSF at a resolution higher than the imaging data with which we constrain it). The model is super-degenerate, so we are in the process of adding (willy nilly) lots of different regularizations. My "big idea" at the meeting was to model the PSF using only smooth functions, because we know (for very deep physical reasons) that the PSF cannot have features or structure below some fundamental angular scale (set by the diameter of the telescope aperture!).