Automated/template-free astronomical spectrograph/spectrometer calibration. Given an emission spectrum and a list of known wavelengths that you expect to see, we try and determine the pixel/wavelength relationship. Traditionally this would either be done with templates (convolve a known spectrum and see where it lines up) or by hand (identify peaks and pixels and shove them into Excel).

Something of a passion project that's being used by a few researchers now. We're hoping to get a paper out at some point. Currently overhauling the fitting code/config handling.

https://github.com/jveitchmichaelis/rascal