Today I finished my open-fiber proposal, with Adrian Price-Whelan (Flatiron). We discovered that one of the oddities that we discovered yesterday—to wit, that there are no spectra of very luminous red giants—comes from an interaction between any sensible parallax signal-to-noise cut on the ESA Gaia data, and the bright limit on the SDSS visible spectrographs. Brutal! We have to select in some way that doesn't make the signal-to-noise cut (since the bright limit is unavoidable). I have ideas (one of which is in this paper), but I didn't have time to implement them before we had to submit the proposal. Oh well! We will get opportunities to update our target lists later.
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