After having many conversations with Gaby Contardo (Flatiron) and Christina Hedges (Ames) about finding events of various kinds in stellar light curves (from NASA Kepler and TESS), I was reminded of dictionary methods, or sparse-coding methods. So I spent some time writing down a possible sparse-coding approach for Kepler light curves, and even a bit of time writing some code. But I think we probably want something more general than the kind of bilinear problem I find it easy to write down: I am imagining a set of words, and a set of occurrences (and amplitudes) of those words in the time domain. But real events will have other parameters (shape and duration parameters), which suggests using more nonlinear methods.
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