hypothesis comparisons

After Lang gave the Galaxy Coffee talk at MPIA, there were lingering questions about the differences between modeling a little smudge in co-added multi-epoch data as a moving, unresolved star or as a non-moving, extended galaxy. In the co-add, these hypotheses are hard to distinguish, but in the individual images, these hypotheses are very different, even though the object may not be measured with good signal-to-noise at any epoch. We began the work of explicitly making the non-moving galaxy model, so that we can perform clean hypothesis tests and quell the last of our critics.