My enforced week off work has been awesome for writing code. I deepened my knowledge and interest in the Google (tm) Colaboratory (tm) by writing a notebook (available here) that constructs fake stars in a fake galaxy and observes them noisily in a fake spectroscopic survey. This is in preparation for measuring the selection function and doing inference to determine the properties of the whole galaxy from observations of the selected, noisily observed stars. This in turn relates to the paper on selection functions and survey design that I am writing with Rix (MPIA); it could be our concrete example.
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