PHAT Camp, day five

I worked on wording, equations, and pseudo-code for completeness inclusion in the various PHAT projects underway. Gordon and Weisz successfully ran the PDMF fitting code from end-to-end on both simulated and real clusters. Also Maria Kapala (MPIA) came by and we looked at the pixel histogram in various PHAT UV HST images of the M31 disk. She is looking to see if it is possible to measure the light from the unresolved and undetected stars in the UV as a shift in the pixel histogram in the UV images. The histograms were nearly incomprehensible, making me wonder if MultiDrizzle is messing up the data. Of course I have never been fond of Drizzle-like algorithms, because they treat the data as overlapping square bins of photons and not samples of a pixel-convolved-psf-convolved intensity field. More on that here next week (for Brewer's sake if no-one else's). We may try to chase down the reasons for the pixel histogram issues next week.