Mierle and I worked through some small remaining issues in Blanton's simplexy code, which is a very simple peak-finding and measuring code, suitable for finding stars (or other sources) in astronomical imaging, with very few free parameters. The hope is that we can hard-code simplexy so it works on almost all possible input images without much modification. Checking that it does is the next order of business; so far we have only tested it on a single (real) image.
Blanton, Moustakas, and I discussed the things you can learn from galaxy emission lines, in particular star-formation rates and the electron densities and temperatures in ionized regions in galaxies. Moustakas believes that he can rule out a suggestion in the literature that the electron densities in star-formation regions are a strong function of redshift.
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